HCG levels slowly rising not doubling

Hi everyone this pregnancy has been extremely stressful.. my first HCG level was in the 1000’s I’m not too sure how far along I was. Last week (based off last mentral cycle) at 5 weeks 5/6 days they were 3123, today another blood work (so 4 days later) they’re only 4,778. I went to the ER because my doctor kept putting me off. (I have history of ectopic pregnancy, right tube removed so I was worried because I was getting pains)

At the ER the doctor told me they’re thinking ectopic or miscarriage.

Anyone had low rising numbers? I’m so confused..

I was so excited for this pregnancy and now I can’t stop crying