Please help! Jaw issue vs sagging? (Photo)

I have these “fat pouches” under my lower lip. I have gotten so many opinions on it and told so many different things. I have had many dental issue and work and also have an overbite from many years of thumb sucking years ago. Could it be that? I was told that’s possible was also told lipo in that area would work. I was also told fillers which I have tried and saw no difference at all. I feel like when I bite/ suck in the parts It goes away. IS there a surgery that remove it from the inside?!