i am sorry to hear of you situations. i don't have the answers sweetie. i wish i did.
i have been serching for answers myself. i have lost both my parents in the last couple years. had a petloss that was devestating for me. recent surgery. seems like it never stops. so i know what you are saying. different situations but still i know what you are saying.
i have been in counseling, recently started taking an antidepressant. as hard as i fought to not take one i am. don't know if it will help me either. i'v been in counseling for couple months now. it does help to just talk with someone like that. someone you can just "let 'er rip" with and cry on if need be (i admit i havne't yet but came close). i'm a christian, believe in God but still i'm only human and have all the emotions that just don't seem to stop. counselors can help you understand why you feel like you do.
doing small accomplishiment (and i mean small) baby steps has help me gain some control.
might i suggest talking with a counselor. believe me its not the same as talking with your parents or friends. someday i hope to get out of this tunnel i'm in. with Gods help. i do believe things happen for a reason. and even when all seems hopeless it really isn't. you will find you do have some control over your life. small as it seems its control. please take it.