HCG levels after miscarriage

Maria • Praying for rainbow baby #3 🎈🙏🤍
I had a miscarriage on 29th of Demember. I didn't have a D&C but my doctor gave my cytotec and I miscarry physically. I test today with a pregnancy test and it was faint positive and an ovaluation test andit was positive also. I still have hcg on m blood. Should I test with a pregnancy test as long as it turned negative or should I make a blood test ?
My HCG level for 6weeks was only 1590. Do you think it will drop soon ?
We want to TTC again !!!