Help!

Okay so my period is on a 28 day cycle ALWAYS but last month my period was suppose to come on the 4th and it didn’t come on until the 16th.. this month my ovulation date was 30th but my boyfriend came inside me on the 25th and my period was suppose to come on the 14th and I’m currently waiting for it to come on. I don’t think I can get pregnant (not that I’m trying) but my boyfriend has been coming in me for a while.