How severe are most cases of pityriasis rosea?

I recently went to the dermatologist and was diagnosed with pityriasis rosea. For over a month, i have had the Herald's patch on the back of my thigh. In the last week, the little bumps are starting to pop up. Do all cases get really bad? Should I expect to get quite a few? How long does a typical case last? Just want to know what I am in for in the next month or so. My dr said it just depends but just curious what other peoples experiences have been. I am a 29 year old female. Thanks.How severe are most cases of pityriasis rosea?
I have it right now. They say it can last 1 to 3 months. I have had mine for two weeks and it is very itchy.. or was until I started sun-taning. Tons of sites said that this has helped them. I have light skin thge color of carmel candies so i typically don't go tanning. However, I am doing it and it helps. I was at the beach yesterday and it didn't hurt or itch. Today I layed out and it was better afterward. Not all cases get bad. I used lots of benedryl though at first it was horrible.