vinegar is an awesome home remedy for any burn....the quicker the better! SOAK a towel or paper towel and lay it on the burn...if its a large area use it from a spry bottle and keep it wet untill the pain stops.
You have something very bad here. You have second degree burn which is very bad. You should definitely see a dermatologist. That exact thing happened to my cousin and when he came beck from the dermatologist he felt amazingly better. This is my 600th answer!
The best advice is to allow time for the blisters to heal: Don't pop them yourself. ... Other home remedies for sunburn treatment include lavender oil, cooled tea, cucumbers Aloe vera and ... It has definitely cooled it down but has not helped the blisters.
This is an old family healing tool....ONION!! It may sound gross but it actually works! All you do is place the onion on top of your burn and after a couple of placements your burn will heal. WORKED ON MY MOM LIKE A CHARM. ;)