Need help for my PR badly

Currently, I am on my fourth week of having PR. I began with my herald spot on my left arm. It was no more than the size of a pencil eraser. I had that for about 3 weeks before I began to see little red dots appear on my chest. I wasn't alarmed by them as they looked like acne. A few days later the dots spread to my shoulders and upper arms. I went to urgent care because I thought it was an allergic reaction and they told me it was some sort of rash and to use hydrocortisone cream and selsun blue. These only made the rash start to itch. A week later I went to a dermatologist to diagnosed it at PR. She gave me anti-viral medicine (Acyclovir 400mg to be taken 5 times a day for a week) and anti-itch medicine (hydroxyzine 25mg to be taken 4 times a day for a week). I was directed to use head and shoulders and take benedryl before bed. That was 3 weeks ago. Unfortunetely, the rash began to spread to my arms and down my legs. My ears also became very, very dry and cracking at the seams. I began researching home remedies and found that sunlight helped greatly. Well, a week and a half ago i went to florida for my spring break and (though it was very embarrassing) I took my shirt off in the sunlight for 4-6 hours a day for 5 days. I only saw improvement on my shoulders as the rash became pink and started to fade. I came back to school 3 days ago and the rash is still prominent every where on my body. I went to a tanning bed yesterday and havent seen improvement yet. It continues to itch even when im not hot. I would appreciate any advice on what to do to help the rash dissapear.

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