hCG from 76 to 50. Any hope?

Anna
I've already had three miscarriages (no living children) and this is my fourth pregnancy. I was told to expect bleeding in the next couple of days because of my dropping levels, but I haven't had any signs of miscarriage except for the levels. I was at 4w 6d when I when they were at 50. Is there any hope? Any success stories?