I had a sore throat / swollen tonsils for a few days, and after I got this 'U' shaped rash from the bottom of my stomach, up to my armpits. Just red patches, some dry skin scaling over. I also noticed dry, kind of skin patches on my groin area as well. What could this be?? I did change both my laundry soap n body wash recently as well, could this be the cause? 19, male, 145 pounds.