Is there a chance I'm pregnant

hi guys I've been on a tablet called Duromine and I've been on it for 13 days and now my period is 3 days late and I know I had sex 3 days before I started taking this tablet on my ovulation day is there a chance I may be pregnant a few days ago I did feel like I was gonna vomit but wasn't sure if it's a side effect from Duromine thanks