You are mentally weak, get mentally strong by not letting your emotion contoll you, thinking rationally and behave poaitively, get that mental atrength buddy, itbdoesnt matter we got anciety or depression there is still room available to reach your full potential, even being diabetic cant prevent people from reaching their other goals like hitting the gym and being in shape.
Dont pitty yourself, retain that power dont give it on self pitty to decide how you sleep, how your day goes, how you think, etc.
Read some books too, help a lot,