Holy cow. You ,must have been in some serious pain to get all that. the burning sensation is definitely a nerve problem. When a nerve is damaged, it will give a burning feeling. I would say there was a lot of irritation due to either the needle or the medication. I'm hospitalized a lot and once, an I'M needle hit the nerve in my hip. At first, it burned so bad, I wanted to scream. To this day, that area is numb and very sensitive to touch. I know that sounds like an oxymoron, but it's real. You need to have it looked at by a specialist. Feel better.