My bed linen is getting stains on it like in photos, and I have been bitten overnight for 2 months despite vacuuming, steaming and spraying bed & bedroom. I thought it was fleas as my cat does sometimes sleep on the bed. Cat treated for fleas. But what do you think of the stains? I have searched and no sighting of actual insects anywhere. Tiny black droppings on sheets, though. Feeling stressed if it’s bed bugs, we’re about to move house!