Sex related question

Hello, so I recently had sex like 5 days ago and I am a bit worried because we did it like 5 times and he said he cummed inside of me each time we had sex. My period is suppose to start on the 27 which is this Monday. My ovulation ended the day before we had sex. However I have been cramping up since the 19th. Which was before we had sex so I assumed my period would be starting. But I’m still cramping up even today. Should I be worried or am I fine?