Mewing caused my sclera to show more. (High palate due to incorrect mewing) How do I fix it???

So I started mewing about 2-3 years ago, only recently have I noticed that the appearance change isn't what I hoped it would be. I came to realize I possibly gave myself a higher arched palate. Noticed that my soft/middle palate is steep compared to the front. The ridge behind the teeth feels more pronounced and the gradient is noticeable. Anyways, I realize my mewing possibly pushed just the middle of my palate up and not really up and forward creating the maxilla upswing I was trying to achieve. I also realized my posture is kind of bad. Is there still hope for me? My face now just looks more round, feel like my jaw actually recessed a bit and my maxilla down sung slightly. Creating a bloated looking more wide face rather than wide and swung up and forward. Really need tips. I've read through some of the forums on high arches and it seems that better posture and a different mewing approach is required to achieve gains. Mewing more towards the front and focusing pressure near the incisive papilla is what I am going to try to do instead of just trying to jam my posterior 3rd up. I am currently 18 years old, so possibly there is still time to fix this to a noticeable extent. Taking photos from a distance just makes my face look really bloated, with barely any definition, which is really disappointing considering how long I've been trying to mew for.