oh god am I pregnant? Just a super late period? Help please

Hi. I’m 16 and I have been having very irregular periods. I am in a relationship and we’ve only had sex one time, but that made my period come early. After that, my period came two weeks later and that was on June 22nd, and finished up around the 29th ish. We haven’t had sex since around May. But he has fingered me and would touch his dick but his hands wouldn’t have cum on them. I didn’t have a period all of July unless it comes tonight. I’m just wondering what’s wrong with me because quite frankly, could I be pregnant? He didn’t cum or get cum in me as far as I know. He said he always wipes his hand off and shakes it to make sure that if there IS any cum it’s died by then. I went to the doctor and was prescribed birth control but told not to take it until after my next period. But I’m 40 days into my cycle and I don’t know what’s up! Can anyone help me?