Underbite and braces. I'm very uncomfortable and wondering if this is worth it?

I got braces 2 days ago for an under bite. They didn't say how bad it was but personally I don't think its bad compared to other peoples. They said I should have them for 2 years but my teeth aren't crooked its just an under bite. I might be able to get them off in a year and a half. Is it to late for surgery? I'm extremely uncomfortable and cant stand my braces anymore, they caused so much pain, they tear up my lips, and I'm so uncomfortable. How long do you think I'll have to have them?

No doctor answers yet