my back was itchy one day and i thought nothing of it. but later that same day my chest got really itchy and i noticed that i had a rash. it kinda looked like small little pimples, only it was very itchy. i couldn't stop scratching. i tried over the counter cremes like Cortaid and Aveeno, but it didn't help any. the next day, the rash worsened. it was very red and very itchy on my back. i also develop pimple like rashes on my forearms which weren't itchy. the next day, my back rash got better, but my chest rash got worse. 5 days after my rash initially start i had a really big red, painful, NONoozing rash on the skin between my breasts, my stomach, and my throat area. i still had the pimply bumps on my back and arms, but they weren't itchy. i went into urgent care to see a general doctor, who couldn't identify what caused my rash. she said that was most likely contact dermatitis since it was in a localized area. i explained to her that it was a rash that seemed to be spreading but she didn't say anything. she prescribed me zyrtek and betamethasone dipropionate cream and told me to take the zyrtek once a day, and apply the cream twice a day. it is now 4 days later, and the original rash has stopped itchy, however it has spread to my breasts (covering my entire breast with the exception of my nipples and arreola) and on the sides of my torso and my upper abdomen area. the medicine isn't easing my itching anymore and i'm in agony with this itch and am scared because this rash is so big and so widespread on my chest. what do i have and how do i stop it and what can i do to ease the itching?