Desberately need help!!!!!

Desberately need help. I have no where else to turn. I am supporting two other people thats not including myself or my son. I have lent out money to other's who have not repaid. I am on the verge of loosing alot. I am 20,000 behind.

This is my story (abbreviated version). In 2002 I received a phone call from my father stating your mom is in the hodpital. I immediately flew to where they lived with my other half. At this point both my parents moved in with us. My mom was left side paralized and my dad was terminal with Pulmonary Fibrosis. My other half quit her job to take care of my parents. In 2003 my mom suddenly passed away. Then in 2004 my father passed away. During this time my other half Chris relized she wanted to be a Nurse. She now is in Nursing school. Except taking care of my parents has put us in a finacial bind. Chris has given so much up to take care of my parents and now I feel  I have failed because I can't continue to pay for Nursing school. Now my sister has become ill and is moving in with us. I have given everything I could to everybody else and have put my finacial's in jeopardy. Im not complaining because I would always be there if people needed me. I am desperately trying not to loose what I have..House, car. My bills have become behind, school tuition is due and I have to pay for my sisters move. Yes I work full time,but its still not enough. chris also works. we are struggling, but are sinking fast. Its' hard to look at my son and tell him we can't do things. He dosent understand all this yet. All he knows is now we have someone else coming to live with us. I have asked banks for loans, but keep getting denied. Somehow I need to come up with $20,000 to get caoght up. Is there anyone you can offer HELP?