How do you overcome it? I get depressed often and I have found that its best to keep yourself occupied. I read, go on the internet, watch television.You need things to stop yourself thinking about your illness, the new hospital or doctors appointment and worrying about the future. I also feel its important to get in touch with people who have the same conditions as yourself. Its often easy to think your the only one that has no energy, is finding it tough to breath etc which does make you feel isolated but once you get in touch with others you feel less alone and also they are a source of advice, encouragement and friendship which helps a lot.I also think its important not to look ahead to much. Just take one day at a time and try to enjoy the here and now as best you can.
Above all never feel its wrong to feel depressed, its natural and you wouldn`t be normal if you didn`t feel down sometimes.