Ejaculation

I had sex with my bf two days before my period started. We switched on and off with a condom / without (bc it irritated me at times). My period is usually very regular and he didn't finish (he says he has really good control over it too) I was just wondering if there was any way it could affect my period / make it late or anything like that? I've been getting the usual cramps a day before and all my symptoms that happen before my period have been consistent I just wanted to be reassured