anyone with an underbite?

I have had an underbite and it has always been my biggest insecurity. As a child, I remember people always staring at me very confused when I would eat. As I got older and became conscious, I became more aware of my underbite and chewed differently to mask it. My teeth bites only on the sides and a little better on the right side than left. The very front teeth don't touch when I bite. With MS, I notice I'm not biting down the same way as before and I have to bite completely down on the left and right sides of my teeth. It is very expensive and takes atleast 2 years for underbite treatment and It's never been a priority but now I am thinking more about it's importance because of MS. Does anyone else have an underbite or advice for how to bite food as best I can?