Implantation 🤔🤔

I’m not sure what’s going on with my body. I’m 19 years old , I just got off my period last Monday and that same weekend I had unprotected sex with my ex. We were together at the time but, I’m not sure if it’s too early for me to be bleeding but I wiped and it was light pink blood. On my undrwear it’s like a brown discharge type of blood .. but, I haven’t cleaned up yet. Its only been a week. No negative comments please because i really don’t know. Just want help.