Confusion

So three days before I lost my virginity I had a serious stomach ache, it was so painful that it nearly killed me(it isn't the kind that you need to poop). But then I lost my virginity,  and my period should come a day after that.
 I stressed out a little about not having my period yet, and worried that I may get pregnant(even tho we used condom), and I have been losing sleep, I'd fall asleep at 3/4 am. 
How can I make my period come back...first time in forever I want it to come so I can prove to myself I'm not pregnant :(