The other day I had sex with my SO and he forgot to pull out well I got my period 2 days after and well my period started off heavy very heavy and now its not even there like it's gone. That's not even normal for me my periods are always constant and heavy they usually last the full 7 days... it's only been 3.. I'm confused & nervous.. is it possible that I'm pregnant and that's why it stopped so suddently?