I need opinions😫😫

So my boyfriend and I had unprotected sex on the 20th. He said he pulled out mostly all the way (so assuming he came inside me some), my period came the next day (21st). It’s been super light when it’s normally really heavy. I wasn’t supposed to get my period until the 24th, but on my last cycle it came 3 days late. Does him cumming inside of me have anything to do with my period coming early or am I just not regular?? I’ve been on the pill for 2 months.