I Was Told I Might Have Miscarried Or Had A

I was told I might have miscarried or had a molar pregnancy. But there was too much blood for them to see, they said to report back in 48 hours to recheck my blood. If my BHCG is high by then, it will be a molar pregnancy, but if it is lower it will be a miscarriage. I was wondering what would happen if my BHCG stays the same. Please help me I'm very worried. I its my first pregnancy.