implantation bleeding or start of period

Amanda • 28, married, one 6 year old boy, hoping to bring a little girl in to our lives next. TTC for over two years now.
I've been noticing a light pink color when wiping the last few hours. I'm on day 24 of my cycle. Last couple cycles were 25 days. I ovulated the 31st. Could this be implantation bleeding or the start of my period?