I fell down the steps and have huge hematoma and dent on left buttocks. Can it be aspirated and filled with my own fat?

I feel down the steps about 1 month ago and I have a huge bump on my left buttock and what seems like a dent under it. I need a plastic surgeon who will look at it and tell me what I need. I got a bbl about 7 years ago and I feeling very insecure. my doctor wont refer mw to get an ultrasound and see if it can be aspirated. I just need guidance