Hcg after a miscarriage


So I had a miscarriage last week Wednesday night into Thursday... had an ultrasound on Thursday and there’s nothing in my uterus. On Friday I saw my obgyn and had hcg drawn. Then just yesterday Tuesday, I went back to the clinic for my 2nd hcg draw to make sure that it is decreasing.. the hcg draw from Friday was 38... but had increased up to 54 on Tuesday.. now I’m just so confused... I’m schedule for another hcg draw on Monday... is that even possible for my hcg to increase after a miscarriage? Im just finally starting to accept my miscarriage from last week.. and I don’t have the energy to get excited or whatever..