Ashriv723 on "New here. Help!! [expert ID needed]"

Hi everyone. My husband and I have been getting mysterious bites. We got them for about 2 days. We inspected our bedroom, mattress and found no sign of blood stains, eggs, or cast skins. We vacuumed everything and really did a major clean in our room. Since then, we haven't woke. Up with any new bites. *knock on wood* but of course I'm not convinced. So today I found this. *see pic* and I'm terrified that it's a bed bug cast skin! Please tell me it's not. I only found this one and it was after I was sweeping under my radiator. Found no eggs or anythjnf of the sort. Thanks in advance!