No, I don't think it's implantation bleeding.
So you don't think it's implantation bleeding
If you're on birth control and using condoms (if you're using them properly) the chances of you getting pregnant are very slim. Birth control can cause slight bleeding or spotting in between cycles; so chances are that's what is causing your spotting.
it could be just spotting, if you recently got on birth control it can make you spot because your periods are trying to get use to it.