I look really disheveled but in terms of mewing, i know i am really recessed. I also have a problem where my philtrum juts out, making me look like a chimp. I have a very tough time keeping my lips together (any suggestions on how to keep lips sealed). Even when i think my lips are sealed, when i look at side profile, they aren't actually sealed. And i have an overbite. Can i fix this with proper posture and mewing alone? what are my issues you see?