my parents found out that i had sex and drink and smoke, three weeks late for period

At 16 you can also be irregular with your periods. You said you were a week late in August.

I seriously DOUBT that you are pregnant from what you've posted.

I agree with Blankcanvas.

i think your a spoil brat seeking attention i think your a fraud and faking it and your lying you are delusional and a spoiled brat thats all attention seeker

Well as far as I see it by what you have said it was a much your choice to have sex just like most teenagers these days and both guys never talked you into it, you took the plan b with in 24 hours so you would stand the highest chance of it working. With one thing and another that's been going on lately and being so stressed just lately you could even skip a period altogether what can also be normal.
When is the homecoming dance then?
As for your parents taking you there and picking you up again that's understandable and yes I would probably do the same if you was my daughter too and some things like that your just going to have to accept, your lucky they are even letting you go. Try talking to your mum closer to the time and explain to her rationally how nice it would be to have your phone back for that night so you can take pictures of the event not just for you but to show them how nice everyone looked and how good homecoming was and on the condition that's all your use It for, you need to earn there trust again. Things won't be easy and it's not the end of the world and you will get over it sweety trust me. Everyone that's done something wrong and gets caught and punished wish they could do the same and in back and change what went on but we can't and it's just something we live with and learn from its called life, everyone makes mistakes and we learn from them and how to build trust in people again.
I'm glad you feel that I have helped with what I have advised you about and I hope you also see that what you may feel is harsh punishment your parents are giving you isn't really that bad and it's down to you now to earn there trust back, to them you still there baby girl that needs to be protected and wrapped in cotton wool and as I said no matter how old you are to them your always be that baby girl they feel they need to protect.

And I think your just a spiteful person that needs to live with the times and get a life in the real world of today!

Thank you :) the dance is october 22nd. how do i earn trust? they said that the tracker use to make them feel like i was always where i said i was and that made them trust me (which to me shows that they never trusted me in the first place) they also said that when i get my phone back snapchat is being deleted. my parents never liked the idea of snapchat and i got in almost a year ago. there is no evidence that i did anything wrong on snapchat but they think that if im having sex i probably have sent nudes also. how can they ever let me go anywhere ever again? i will never have a sleepover again.

I think that you are an attention seeker as i already told you i dont need your help but you have nothing better to do. how am i spoiled???

It wasn't that they didn't trust you by having the tracker show where you was all the time it was more a case they knew where you was all the time incase you got abducted or something like happened, I don't think they used it as in so much to spy on you but for there own reassurance.
Trust you have to earn by not complaining about things like being escorted to and from homecoming having snapchat removed from your phone and stuff like that an also by being where you say you are and being home by the time your told to be and stuff like that, I know it sounds hard but he that's what it takes to earn trust that's what your have to do.
Your parents are probably a lot younger than I am so grew up more in the digital age compared to me so I don't quite understand why they are being so strict about you not having your phone. When I was your are it was only the rich that had a mobile phone that was the size and weight of a brick and after 24 hours charging you would be lucky to get a 20 minute call on it, social media didn't exist and come to that neither did the internet as we know it today, the only way my parents knew where I would be is by what I told them and if someone happen to see me somewhere else and tell my parents I would be in trouble just like you.
As I have said many times just give things time to settle down and your parents to gain your trust again and you be able to do more again, I know it seems like the end of the world for you at the moment but it's not and you will survive with just basic needs and as I said if your friends are real true friends they will understand what your going through and stand by you.
Just ignore everything what that other guest has said Sarah and just focus on what medic dan and I have told you.

Well she is in her sophomore year , she is not in her senior year to understand how things properly work and I think it's harsh to call her a w**** and tell her to f*** a guy . So keep ur mother effing mouth shut

ha ha ha ha ok,whatever u say

Its okay girl!! Im in the exact situation right now! we got this !!! team plan b !!! Yayayayayayay :)