Still worrying

I had a miscarriage last year at 6 weeks so very early no pregnancy symptoms etc. I'm now 9 weeks 2 days I had a scan at 7 weeks 5 days & saw a heartbeat but I still worry so much 😥 hear so many stories of women miscarrying after seeing a heartbeat. I have the odd bit of cramping which I think is stretching I have sickness and tender breasts so I have symptoms! I just keep thinking the worst is going to happen & I'll lose it again.