Miscarriage after seeing fetal heart beat?

Guys I was wondering if anyone has experienced a miscarriage after seeing a fetal heart beat. I am 8 weeks today and I had a scan at 6+1 and 7+3 and both times there were strong heart beats. I’m losing all symptoms that I had (which is only frequent urination) and now panicking that I may be having a missed miscarriage. I had slight brown discharge today so that’s raised by anxiety. Has anyone suffered a miscarriage after seeing a heart beat and what was your experience ? Thank you