Unprotected Sex

I had a quicky with a guy today and we didn’t use a condom (he didn’t cum in me.) I’ve been on birth control pills for years but changed to a different brand of pill about 9 months ago. I take it on time and have never missed a pill. I’m only concerned because my period hasn’t been regular since starting this different BC. I’m still protected right?

I’m also on a “fertile day“🙄