pregnant or not

Okay my question is this I have irregular period which mean it comes one month skip a month then have it. My last period was August 27 which September I should skip that month but on September 26 I found out I was pregnant excited it will be my third child. Went to the first ultrasound my midwife say she only saw a sac maybe I am 5 Weeks pregnant so she told me to that I need blood work done , October 24 hcgb was 7415 and the 26 my hcgb is 8812 I had sex with my husband Friday and Sunday I start to had light spotting I freak out  so on the 27 I saw another midwivethey did another ultrasound and say I had a miscarriage and he told me my hcgb will drop so again I did lab work and my hcgb is 9581  I don't believe it so he schedule me on November 7 for another ultrasound which he confirmed me again I miscarriage. Me and my husband don't believe it. I don't have any symptoms of miscarriage. My husband think I am pregnant just to wait.because my period is irregular.