Pregnancy scare freakout!! 😬 comment please!

I had what i think was a period but im not sure, and im scared it could have been implantation or pregnancy bleeding.

The bleeding lasted a total of 5 days with the last 1 or 2 days being brown spotting. The blood was bright and dark red. There were clots and the flow was medium/light.

Was this 100% my period? Or could it have been implantation or pregnancy bleeding? Could I possibly be pregnant or am I 100% NOT pregnant. ( sorry for two questions )

I do not want to be pregnant 😬 im way to young and have learned my lesson with this scare.