Hcg levels slow rising .

Kay

My HCG levels on Saturday were 1,777. I got another hcg test on Tuesday and my levels were 3,444. I’m nervous that they are rising slowly. I had I threatened miscarriage because I had spotting the other day but it was too early for the doctor to tell if anything was wrong( I’m 5w5d). The spotting stopped after a couple of hours. Do my hcg levels look concerning ?