I'm 17

I had sex with my bf kinda didn't want to but we did I thought we used a condom but we didn't and my period is usually here every month never fails I'm 1 week late and idk what to do.. His married And is 21 so I'm scared that I'm pregnant i knew he was married but he said he was getting a divorce and his wife was seeing someone else they got married when he first got in the military now she doesn't want to give him the divorce what do I do ..