HCG levels :(

Hi ladies, I am 7 weeks and 3 days pregnant with my rainbow. I haven’t felt any symptoms so I went into the doctor to make sure my levels were doubling every 48 hours. I got blood done on the 26 of September and my levels were 60,712 and again today and they are 85,353 :/ not even close to doubling and now I’m worrying that I’m having another miscarriage :( has this happened to anyone and ended up with a healthy pregnancy? I’m so worried..