I'm on birth control and about 7 weeks ago my boyfriend and I had sex without a condom. I started stressing immediately and was nauseous and had cramps all month long. I got, what I'm hoping was, my period on the same day it comes every month but it was brown and clotty and lighter than usual. The second day was extremely heavy with a HUGE clot and red and lightened up later that day to normal. The next 4 days were brown and lighter than usual (not enough to fill a tampon but not light enough to go without one). It then ended on the same day it does every single month. The next week I took 2 pregnancy tests, both negative. The next week I took 2 more tests and they were also both negative but I'm still nauseous on and off and I'm scared! My next period is due in 5 days.

Being nervous can make you sick, you can not take a pregnancy test till about 14 days after it was suppose to come, so perhaps you are also testing too early.

Not sure why you are nervous, you know the possible result of sex and take that chance. If you do not want to become pregnant, take more safe guards or just do not have sex.

Also wait till next period and see if it comes.

Sounds like you are just making yourself sick with worry