Could be bed bugs, yes they do exist!!! Do you have any indoor pets? Fleas are getting dominant this time of year, with the rain. Good thing is to wash all bedsheets, pillows, and vacuum your mattress (both sides). If you have pets indoor, make sure they have been given their flea medication, then one day when you have a few hours, take them and leave while using a raid type flea bomb, vacuum when you get back, it has to be ventilated well before returning.

On the other hand, I do have anxiety, maybe I got bitten by something small, and seems the rest of the day, I feel like Im being bitten, yet cant find any red spots, etc. to indicate so.