I was diagnosed with shingles yesterday and am on a course of aciclovir. The rash starts under my right armpit, goes round where the band of my bra sits and it’s on the skin under my breast. The pain is excruciating and I’ve been applying a gel that the pharmacist suggested. For those that have had shingles before, how long can I expect the pain to last? If feels likes the worst kind in sunburn and I’m in agony.