I was always told by doctors I couldn't get pregnant, but I got tested regularly For a while. Around this time last year I thought I might be, but all the tests said I wasn't. Until march when they told me my blood tests determined I was a few weeks pregnant. And upon an ultrasound they discovered I was actually 6 months in! I had to give my child away because I couldn't provide the care he needed.
I haven't had a period in several months now, I'm getting emotional and gaining a little weight... and now I'm paranoid as all hell, and started taking frequent tests till I realized that if there's something worrying with my body that doesn't allow them to detect it... how am I supposed to know If good forbid I actually am pregnant before its to late to abort? (I CAN'T give up another child I'd go insane.)

A blood test at the doctor should determine.

Are you using at least two types of birth control when having sex in attempt to prevent pregnancy.