Answers please !

I'm trying to conceive but I've had cancer and I have PCOS . Double whammy 😑 so I had sex like 2 times maybe like a week ago around the time I think I ovulated (I have irregular periods too) but today I woke up wiped and it was pink or light blood in my CM sorry TMI but idk what that could mean . I looked it up it said it could be a million things I just wanna know has anyone ever experienced this ?