(English not my native language)

I was wearing common braces with elastics for 2 years.I got them off in 2012.I wasn't(and I'm not) happy with the results.My face is ruined and it's noticeable.My jaw is shifted forward.My ortho said that he can't do anything.Another ortho said the same.

Yesterday I decided to take off my non-removable retrainers (I was wearing them for 3 years) as i heard that teeth usually shift back as they were before braces.Will my jaw shift back in its original position if i don't wear retrainers?

If yes,how long will it take?6 months,1 year or more? (20 years old)