Dramatic change in libido

I stopped taking the pill a month ago and my sex drive went back to normal after being slowed while on the pill. But my period is 4 days late now and my sex drive has increased DRAMATICALLY. I've also been feeling gassy and just a little constipated. Also had an instant the other day where I smelled something and instantly puked. Hasnt happened again yet. Wondering if I may have gotten pregnant.