I Was Exposed To Poison Ivy 3 Weeks Ago My

I was exposed to poison ivy 3 weeks ago my doctor put me on steroids for 15 days I had a 3 by 5 in spot on my left leg. The steroids helped some but when the medication ran the started on my right leg. I also have some rash around my neck . The rash itches so bad I can barely get any sleep. I went back to my doctor 5 days ago and she gave me the drug Interpharm 2 times a day for 10 days and some cream called mupirocin 2% cream glenm applied twice daily. I still have severe itching. I forgot to say the rash on my right leg is about 4 by 8. Any help would be appreciated.