Rainbow baby 7 weeks but having gulity feelings from previous miscarriage

Matika
I am blessed to have a rainbow baby who is 7 weeks. I am excited and understand how blessed and lucky I am to have this bundle of joy. I cant lie I saw this chart and I'm feeling guilty now bc my doctor talked me into getting a dnc at 9 weeks. My levels went from 96k to 92k to 46k in a week and change. I don't know if this was normal or not. Also they didnt have a heartbeat but the baby measured properly at 8 weeks. I told them I had scar tissue from my gastric bypass surgery and I have my hood pierced (tmi i know). They told me those two factors could have messed up my ultrasound bc it messed up my rainbow babies ultrasound. Is this guilt normal? Should I change doctors?