Unprotected Sex//Hymen Breaking/Possible Pregnancy? HELP PLEASE.

Here's my story and backround info:

My last period began June 19th, ended about the 24th. On July 15th, my boyfriend and I had unprotected sex for the first time. The day after, I experience light bleeding that lasts about 4 days...and then on the 5th day it seemed slightly heavier, and slightly redder then stopped. I was expecting my period around that time, and I assume the light bleeding was from my hymen breaking...could that have taken place of my period?

After we had sex, I assumed the light bleeding WAS my period, until I realized 3 days later it could have just been my hymen breaking. I get my hands on EC Plan B as fast as I can...and take it 76 hrs after having sex.

Also,I should probably mention that my boyfriend did NOT "finish" or cum I guess you would say. However, yes, I do know that pre-cum can make someone pregnant. How at risk am I for pregnancy? I'm a complete wreck about it...

Should I wait and see if my next period comes before taking an EPT?

Also, I should probably mention that I have a horrible bladder AND kidney infection. I feel sick to my stomach all the time, pain all over, and stressed. It's hard for me to tell if I have any sort of pregnancy symptoms because of these infections....

I know we made a horrible mistake, and it's most definately not going to happen again. But I need to know how potentially at risk I am...I want to believe my chances are slight, but I want to hear what you have to say!

Thank you, and I appreciate you taking the time to read and post!

Chances you are pregnant are slim to none. u have done all u can and plan b is very effective. try to relax because if u keep worrying ur period may not come and u will only make urself sicker.

me and my girlfriend are into the same situation right now...we also belive her hymen broke yesterday and she is expecting period today but it hasn't come yet...I am really worried and i don't know if when the hymen breaks , the period is late. i hope it's just late and not something else.