It's been a month since my Median Arcuate Ligament surgery and i still have pain?

Hello. I am 15 years old and about a month ago i was diagnosed with Median Arcuate Ligament Syndrome. They did surgery and they said that my stomach pain would go away.(I had stomach pain for over a year before they figured out that i had MALS). The surgeon said that it would take a while for the surgery to work but she said everyday would get better and better. But for me i am getting worse and worse. We called her and told her this and all she said was to drink a lot of water and rest. But that's not good advice because that's all i have been doing. I have also developed a pain in my right lower back. No one knows whats going on. I need some help. Any Suggestions.