Is implantation bleeding possible in this case?

I started my period 6-29 and it ended 7-3. I had sex 7-1 and 7-3 when my period was basically over (We are TTC). My period was 7 days late (had a faint positive test 2 days before my late period started). Last night and today every time I wipe I have a slight pink tint to the toilet paper. It is possible this is implantation bleeding or is that crazy lol please let me know if you ladies have experienced this! Thanks!