Has this happened to anyone else?

Hey, so me and my bf attempted to have sex on august 8th. He didn't cum in me, and my period was due on the 12th. I was previously a virgin before our attempt. I started having weird discharge on the 10-11th. Then i started my period on the 11th really early. It was nothing like normal in the sense that it was crazy light. It only lasted three days. My question: was anyone else's period different after there first time? If so, did it go back to normal afterwards.

Side Note: My periods are usually light day 1, but then days 2-4 are heavy/ medium, day 5 is light again. I am also really stressed about this so maybe it is stress affecting this cycle? IDK I NEED ADVICE LADIES!!!