Poor you - I've just kind of recovered and just heard of a freind who's come down with it - could it be something triggering it off, the very warm weather perhaps? Anyhow - good old-fashioned calamine lotion patted on and allowed to dry.
And showers - both hot and cold helped take my mind off it.
And baths - oddly, a hot soak, with lots of cooking salt and bicarb (soap not needed) - then drip dry then add the calamine.
Avoiding clothes (!)
Simple hayfever tablets work well but they completely zonk me so I don't really like them. The doc prescribed an anti-irritant with a long name that knocked me stupid for two days - which I didn't like but you might. Amine-something-tartrate.
It will pass, so hang on in there, keep yourself distracted and take it easy. I found it a very tiring experience, i suppose because it disrupted my sleep so much - slept like a log once the blisters went down. It will take a long time to see the end of the scabs and healing skin, and once the scabs are dry try a good vitamin E oil which has helped mine to not pucker up and itch as much. As well as just being nice to use on your skin in general.
Look after yourself, and watch lots of telly.