Pregnancy

So I found out last week that I’m pregnant from taking 3 first response test and I went to the doctor the pee test was negative they gave me a blood test and it was positive so now Ive had my blood drawn twice first time hcg was at 55 and now a 72 they are wanting to do more blood work. My progesterone level is at a 30. Has this ever happened to anyone? I don’t know how far along I am because I haven’t had a period in over 3 months since the end of June. So I’m not cramping or bleeding. I’m concerned I might have a miscarriage.... picture of test in the comments