I am bit worried I need some reassurance

Had sex with my boyfriend once during this cycle and it was protected. I initially put the condom on the wrong side and I quickly corrected it and licked the tip and to kill off any precum.

With that being said, I’m a bit late on my period and I woke up with morning to a bit of what looked like old blood and a bit of pink.

Well, it’s the afternoon I stopped bleeding so I’m getting scared that it might be implantation bleeding or spotting