Owee, Owee, Oweeeeee...... Just thinking about it makes me hurt. So sorry this happened. Is the burn on your palm? What a pain. If you have not gone to the doctor and had it looked at, maybe you should. I think it depends on the size of the blister.
I burned my back on a heating pad a few years ago. There is a reason you should not fall asleep on them. I had a big blister and also deep burn. The best thing I found to use are gel band aid things. I think they are made for burns. They helped the pain and kept the blister from drying out. I could always tell when it was time to change the bandage. I found them at Walmart i think, in the First aid aisle. I don't think any ointment is needed with these. I think it is part of them. But my burn heeled fairly quickly and with no scar.