2 missed periodsd negative pregnancy test could i still be pregnate

i am 18 years old me and my boyfriend have sex on a very regular basis and we don't always use protection like we are suppose to. my periods are very regular and i usally get them every month i never even missed a month since i first starting getting them when i was 12. my last period was jan.27,07 and it's now apr.4 so i did not get my period in feb. or mar. im not stressed i haven't gained or lost no dramatic amount of weight if any at all everythings been going good for me except this situation. i took a pregnancy test a day before my first missed period which was feb.26(first response preg.test) it was negative,i took another one mar.9(first response preg.test) and it was negative i also took one Sunday(first response preg.test) and it was negative. i don't know what else could be making my period not come iv'e never had any problems like this before so am nervous. is it more then likely that im not pregnate or is to still to early to tell i don't really have any symptoms except a lil breast tenderness,i seem to to sometimes get a headache everyday and i seem to feel a lil nasesous,i get cramps her and ther which makes me think my period is coming but i go to the bathroom and theres nothing...............please give me some advice i would reall y appreciate it.....*THANKS IN ADVANCE*

I am having the SAME problem...last period was feb 1st...neg preg tests and no period!!! what symptoms have you had? Have you gone to the doctor?

Hi,
I'm in a simular situation. I have now skipped two periods. I had a blood test and it came back neg, however I have many early pregnancy symptoms. I've been getting cramps that make me think I'm going to get my period for five weeks, but no period. I've also had breast tenderness, like around my period, and headaches. I've heard of something called the Hook Effect. Its when the HGC hormone that indicates pregnancy is too high and they have to dilute it before it will show a positive pregnancy. If I don't get my period in a couple weeks, I'm going to insist on an ultra sound. Even if I'm not pregnant...two missed periods might mean that something else is wrong.

you can be missing your periods due to stress.

hi...would love to know what your outcome was as I going through the same problem with o avail from my docs!!

it might be PCOS that is what I have