Severe myopia. In my lifestyle changes?

I have power of -5 and -4 can I use phone or watch TV in sleeping position? Does it worsen my situation? I inevitably have to spend tike in front of laptop throughout day...what can I do for tat to not affect my eyes I'm using bluekart lenses to avoid blue light I'm 20 and my power has kept on increasing from age 12 continuously and my cornea has thinned and I have undergone barrage laser treatment due to weak area in the eye I'm I at risk of glucoma? I usually i get floaters and also sometimes pain (like prik) in the eyes at times What can I do stop my power increasing and not let my eyes get worsened Can I take tablets like lutivit capsules? What are things I can do in my lifestyle changes? How should I proceed please help