Ovulation bleeding or implantation bleeding

I had my normal period from the 15th through 19th then I started spotting the 22nd. It is now the 24th and I am still spotting. It’s very very light and only a little amount for all day on the liner and when I wipe. It’s like a light red/pink color and seems to be liquidy. I have never had this happen and was wondering what it could be. Ovulation bleeding? Maybe implantation bleeding? It says I should ovulate around the 27rh-28th. I should also note my partner and I have sex everyday, with no protection and he doesn’t pull out. As we are currently ttc.