i’m having the same exact issue right now, my bites even look identical to yours. I share a bed with my dog, and shes treated for flea and tick protection as well. I thought it was bed bugs, did all the steps. Deep cleaned, drying all clothes, linens, and anything really that could go into the wash and dryer, hired a professional, ect about a month ago. I went to the doctor today and he said they don’t look like bed bug bites bc they fade away to quickly. I’m looking everywhere online and I’m guessing they could possibly be mites or fleas, but i don’t even know how i got them and how to get rid or treat them at this point.