I once got flea bites all over my back and bum after sitting in an infested chair in the waiting area of a hair salon. I just had a hot shower and hair wash and hot washed the clothes I was wearing. It seemed to do the trick.
From what I remember, the bites looked similar to OP's.
Gooseberry crop has disappeared
AIBU To Be So Annoyed at the Stupidity of This
Father's Day Sunday — nobody makes cards for this type of dad



my friend brought them home once. She had to call out a professional for advice and help as they'll be on your belongings too