Dealing with Depression

No one likes to deal with depression but when you are forced to deal with it, it is not easy. I am one of the unlucky ones, my mom has been in depression for the last 3-4 years and she cannot snap out of it. She has been to several doctors and all they do is give her medicine. I get calls all of the time from her crying for one thing or another. Some of the things that bother her are things that really does not affect her in anyway but she will cry for hours about it. As long as she has been in depression, the doctor's have even said that they are suprised that she hasn't thought about hurting herself, but the messed up thing about it is that she has thought about hurting herself. If is very stressful for me because I live here in Atlanta and she lives in Pennsylvania with my dad. I try to fly to Pennsylvania as much as I can but to her it is not enough and not only that but I have my own family and I want to do different thing with them instead of just flying there to see her. She things during this state of depression that everything should be surrounding her and she really dislikes the fact that both my brother and I do not live close to her meaning within 30 minutes to an hour. My brother lives in Annapolis, Maryland but a typical male like my dad as well does not understand why my mom is in depression so my mom only feels comfortable talking to me regarding this because they just start yelling at her which hurts her even more and makes her cry. Sometime, I even get mad at here for some of things that she says but I know her situation and I have been trying to read up on depression and learn more about her condition so I can try to relate and just listen to her. I understand that it is an illness but I feel that if she would go to the right doctor that maybe she could get cured. I try to cope with this as well because sometimes I feel that she brings me down right with her.