So many things going on

I feel so stressed out because there are so many things going on right now. I am in school online and I am starting to have trouble being motivated to do my work so now I am behind and do no want to do it anymore. Not only am I having problems with school, but I am working full time and I am a full time mother. My son is 9 months old and very active and I am doing this on my own. I have my family, but they aren't as much help as I thought they would be. The only thing that was motivating me was my son because I want to be able to give him the life I never had, but I think I am really worn out.I try so hard but things keep going differently than what I have planned. If I can pass my classes then I'll be done in November with an associates degree, but I have no encouragement anymore and no motivation. I am always tired and can't seem to get the sleep that I need. I can't sleep at night because my body is still awake and by the time I do get to sleep my son is waking up to eat. Right now I just feel like giving up; today has been the worst day I have had in a long time. Then I am in the middle of trying to relocate for the second time in a year. I am at the point where I want to say "f*** everything". But, I am trying to have a new approach with life as it is now. Yet everything is so hard and complicated for me.