Okay Im really paranoid that im pregnant.

About 3 weeks ago i had sex with my boyfriend, we used a condom and everything seemed fine, we finished, i went home and since then ive been going to the loo every five mins i feel dizzy and sick in the mornings and i swear my belly feels & looks slightly bigger.

So i went to my doctor, i done a pregnancy test, it was negitive.

That was nearly a week ago and i still feel really paranoid plus im 2 days late on my period, i was gonna go down to the doctors again but what if they think im taking the piss? I mean so many girls my age get pregnant in my area and go down there just to get told off cuz their underage or didn't use protection, it just makes me feel that the doctors can't be bothered with me. :-(