If the area is large go to your GP as infections are common with any burns. I live in Australia and can't say I've ever got to the stage of blisters but the only real relief comes with cool showers, fans, drinking lots of water and after sun creams (zinc creams are good). You can get better creams that will help with pain relief from your doctor or pharmacy. You can also put aspirin (crushed up) directly onto the affected areas. I know you must miss the sun but covering up is better than being burnt.