Pregnant or normal?

Hey guys! Two weeks ago I went to my OBGYN for my pap-smear and yearly check up. At this appointment we decided to switch my birth control after this pill pack due to me getting severe periods even on the pill. I was supposed to get my period yesterday although as of this morning I still haven’t gotten it. I did have unprotected sex two weeks ago, but he did not finish in me. I had normal discharge last week with one point of spotting. Am I stressing too much about possibly being pregnant? Or am I ok because of my irregular periods due to the pills I’m currently on?