Combination feeding and period

Bunie

So when I switch to combination feeding shortly after I got what I’m guessing was my period was about 3 days of light bleeding needed a pad for only 2 of those days.

Stopped for like 2 days then days 6&7 I had spotting I really only noticed when wiping.

Fast forward to now coming up on ovulation week, I’ve been on and off spotting ever since my ‘period’.

I am combination feeding but majority is formula fed.

Is this cause of that or should I go get checked out?