Suggest Treatment For An Itchy Rash All Over The Body

Hello, back in Feb of 2014 I started itching on my wrist and fingers. Within 2 weeks a rash started showing. It then started to spread up my arms til it reach my elbow crease. I went to the doctor and she could not dynoise it without a patch test. She have me a shot and antibiotics. The rash went away but as soon as my meds ran out, I would start itching again. Keep in mind, I keep unsented lotion on it 4-6 times a day. When the rash appears it looks red and blotchy. Very itchy! And drys out fast. Around July is when I noticed the rash spreading to behind my knees and spread down my legs and half way up. I ve been given antibiotics at least 4-5 different times since Feb with cream as well. As SOON as my meds run out, the rash will appear within 48 hours or less. Idk what to do at this point and it s taken a toll on me emotional. I will add around the time it started, up til recently, I ve gone under a lot of stress. I ve never broke out like this before and I always use dye free and sensed free lanudry detergent and fabric soften. Please help me!!!! :(