Hcg level dropping but no bleeding

I found out I was pregnant and the hcg was showing I was further along than I should’ve been because my ovulation was only a week before I tested positive so I had repeat blood work and my hcg level dropped. My OBGYN called and told me to expect a miscarriage but I haven’t bled or had any cramping past a couple days after the testing. (Wasn’t bleeding in the first place but was cramping). Any idea on what is happening? I have another appointment on 1/4.