Talk to Gynecologist on Pregnancy

My LMP is 25June , i took lezra and ivfc injection course and on 23July bhcg was 62 i repeated after 48hours it was 152 My gynaecologist prescribed me duphaston twice a day , ascard , aldoment and folic acid along with weekly ivfc injection of 5000 for 4 weeks

On last friday i was injected 1st ivfc of 5000 Today before second injection i tested bhcg and it is 2056 at 5 weeks I want to know is that normal and healthy? how ivfc injection works in pregnancy? i thought after injection of 5000 thats supposed to be higher Please make me understand if its normal and if not suggest me how to improve and secure my pregnancy

I am very afraid since i have a miscarriage history at 7 weeks