confused?¿

Been going to Dr to check my HCG and Dr said there going up but not doubling I've been going every other day for like 2 weeks still rising and I started to bleed 2 days ago they said it could be cause I have bruised placenta I think I'm having a miscarriage but they said they can't tell me I am cause HCG still rising don't know what to think uuugggg