Jut lost my virginity could I be pregnant?

Im 17 so basically i got off my period Monday Feb17th and was having a little bit of brown discharge cause I had just got off of it right, and so that Friday I lost my virginity and it hurt a bit and I bled a bit and it’s no Sunday and I’m having a lot of brown discharge and when I wiped there was a little bit of bright red blood but a tiny bit. I heard of something called implantation bleed? But I dont know what it is?? I’m lost oh and while losing my virginity at the end the condom broke and he pulled out after seeing it and came on my stomach so he didn’t cum inside me at all. I’m worried! Pls let me know what y’all think!!! ASAP!