37+2 Weeks Pregnant

Does anyone know what this could be?

I told my ob about it and she tried saying allergic reaction. but I haven't changed literally anything. She proscribed me Triamcinolone Acetonide and it's been helping.

I woke up itching yesterday morning but no hives, then came home after my doctors appointment, ate, went back to sleep for a couple of hours and woke up with them on my stomach then it started spreading to my arms, legs, back, pelvic area, and my ears.

I know for a fact its not any type of bites because if it were bed bugs, it would've stopped before I went back to the doctor.

I have had people tell me this is what happened to one of their family members just days before they delivered, but I was thinking it was PUPP.