Lipo and BBL 3 months ago and I can't see any difference in my butt. Gained weight and now have loose skin on my back. Options?

Hello dear!!
Thanks for the question and provided information as well.
You are still early in the healing process, it can take up to six months to see your final results, so please be patient. At the stage you are in, inflammation, discomfort and irregularities are normal.
If you have any concerns, please follow up close with your plastic surgeon.
Good luck :)