I don't know about that specific kind of smell. One thing, I know when I'm pregnant my sense of smell becomes much more sensitive. So could it be that you're experiencing that symptom? My numbers have been declining after MC but I kinda had a feeling they weren't back to 0 yet because things didn't smell like they usually do. It's not fun to get pregnancy-related symptoms during MC but unfortunately, those hormones are still hanging out in your system for awhile.