I'm having very light spotting & mild cramps in early pregnancy i'm 3 months postpartum & had no period since giving birth. could this be miscarriage?

Possibly: Possibly, two blood tests 48 hours apart can give the answer, but if it is, sadly, nothing can be done to avoid it.

Are you pregnant?: First do a home pregnancy test to confirm that you are already pregnant again. If positive and you are experiencing bleeding you need to be seen by a doctor to confirm a normal pregnancy located inside the uterus. An ectopic pregnancy must be excluded.