Spotting the last three days

So for the last 3 days ONLY when I wake up there’s been pink when I go to wipe. The rest of the day there’s nothing - I have had a UTI and I’m on my last day of antibiotics for treatment of that. Sorry for the tmi just really confused as to what could cause this because I never did this with my little girl and thought maybe one of you guys had a similar situation. I’m 6w6d today