Implantation Bleeding ?

I know all bodies/pregnancies/developments are unique so I hesitate to ask this, but I figure it would be helpful to ask women who have already been through this.

My ovulation cycle is December 24-31 with peak days on Dec 30&31. I’ve been having sex every other day (and sometimes more). On December 31 and January 7th I had pink bleeding. Just one little teaspoon and that was it, didn’t see anymore. My periods are consistent and I hardly ever spot (not this color anyway). I’m due on January 14th for my period so it’s too early to test, but seeing this pink cervical fluid made me nervous / inquisitive. What do y’all think?