Cheek Bone problems

I had braces for one year and 3months and when i got them off, i noticed that my lips kept going up when i spoke ( I couldn’t relax my mouth) I had so many theories to why my mouth was being all funny but when i went back to my dentist to show him what my lips do when i talk- He said it was my cheeks, I can’t relax my cheek bones therefore my mouth doesn’t go down when i talk (It looks like I’m smiling and talking- but really I’m not). Since i noticed that my cheeks have been sore and on my left side of the face my cheek goes really high up that it makes my left eye look small. I have really fat cheeks in general and now they feel really tight and intense. My right cheek seems to be okay- nothing is wrong with it but the left side of my face my cheek looks so intense- When i smile it goes really high up and it looks like its moving- I would like to know what can cause cheeks to get tight and intense. I never had any problems with my face till i got my braces off? Can the bones in the face move?