So the other day I noticed a little rash on my belly and just figured it was from itching or something but it's gotten way worse and has now spread to the tops of my thighs and my arms? It's not terribly itchy and I took a Benadryl to see if it'll help it but i have no idea what it would be from. I haven't switched detergents, been stung, or even really been outside. It's really weird but I don't know if it warrants a hospital trip. My doctors is closed on weekends so the hospital would be my only option