Is Skin Peeling, Stomach And Genital Rashes, Diarrhea Due To Strep Throat?

My 4 year old son was diagnosed with strep throat 2 weeks ago. He had a high fever for 4 days (could ve been longer as I stopped checking after his antibiotics) red eyes, red lips with peeling chapped skin, swollen neck, red throat with blister like bumps inside. I noticed after a few days that he had a red rash all over his stomach and genital area. He was treated with antibiotics and everything seemed fine until a few days ago when I noticed his skin peeling on all of his toes, he has stomach pains and diarrhea for that last few days. Is this normal after strep throat? Should I be concerned that this may have been something else even though his strep test came back positive? Thanks so much!