A man walked into the doctor's office." I am not feeling well doctor, I am not feeling well. My head is not feeling well, my feet are not feeling well, my stomach is not feeling well. Can you cure me?"
Moral of the story your question is vague:
1) Was your phone always like this?
2) What happened did it fall?
3) Did you install a certain piece of software?
Just visit a phone repair shop and try and get it fixed. This forum is not going to help you fix this kind of problem at all. Not without looking at the phone at least.