How do I fix this bubble on my stomach 7 months post BBL? (Photo)

I recently had BBL over seas and developed a large fluid pocket on my abdomen and a hard knot beside it... it’s 7 months post op now band the bubble is still there? Should I go to the hospital or another plastic surgeon? I make music and perform, and I show my mid section for work often and have not been able to go back to work because of this. It’s frustrating because I only did BBL to enlarge my buttocks I was naturally fit and this with a perfect stomach and now I’m so disappointed.