I first had shingles in 1998, then had them for the second time last summer after a steroid injection. Last night after feeling tired and unwell all week I realised I have got it again, I have had antivirals for both previous episodes, do I need to get an out of hours appointment as I know you should have them within 48 hours? Also are there any tests or investigations I should ask my GP for as I believe it isn’t usual to get it 3 times?