Implantation bleeding ?

I had unprotected sex about 9 days ago. He didn’t cum or had any precum because shortly after he put it in we decided to stop Because it was going to be my first time and it was hurting and also we knew it wasn’t a good idea to not use a condom . Then we had protected sex this past Sunday. eve said my period was supposed to come 4 days ago. I’m really scared that I might be pregnant. Today I just started bleeding light blood. I’m scared it’s implantation bleeding. What do you guys think? Please help me I’m so paranoid