I haven't had a period in almost two months, I'm on birth control and hardly ever miss a day. In March I had unprotected sex, but he couldn't get it in. I took a pregnancy test 3 days after first missed period and it came bac negative. I can't tell my mom because she would kill me..

Preganncy test three days after missed period is worthless, you have to be at least 2 week late to test.

So go do another pregnancy test, it needs to be first thing in moring as soon as you wake up.