I'm a 19 year old male and recently I've noticed my jaw has grown unevenly. The right side just seems to have not grown out as much as the left side and I think that its because I normally sleep on my right side and have my whole life.

I was wondering it would make sense to sleep only on my left side from now on in hopes that it will slow down any remaining growth on this side, giving the right side a chance to catch up, but I'm not sure if at 19 my jawbone will grow any more than it already has. Also I'm planning on starting to seriously work out soon which I've heard increases testosterone levels and facilitates jaw growth, but I'm not sure how true this is. What can you suggest of my situation? Thanks