M.P.
It sounds like you have very high expectations of yourself and end up feeling guilty when you can't meet them. I suggest that you lower your expectations. Choose, among the voluntary tasks, what you want to do the most and let the rest fade away.
Start using positive talk when you talk to yourself. Instead of focusing on your guilt because you aren't able to do something focus on what you are able to do. Repeat positive affirmations. Instead of saying I should be more excited, say it's ok to be the way I feel. Next year will be different.
Accept yourself as you are. When you start feeling mad at yourself remind yourself of all the good that is in you.
You might also consider taking a mild anti-depressant short term to get yourself over this hump. I've taken Ativan and it's helped tremendously.
Also find a way to get in some exercise. It will give you more energy and help you feel good about yourself.
You are doing a tremendous amount, an amount that most people wouldn't be able to do. Remind yourself this will be over soon. When you get your AA you'll be thru with school and the internship? If not perhaps your feelings are telling you to find ways to reduce your involvement in so many activities.
Your family would no doubt be glad to watch your son so that you could have some time to recharge. Why feel guilty? My daughter has told me she feels guilty because I do so much for her but I think I've finally convinced her that I wouldn't do it if I didn't want to. Helping is my decision. Don't take on responsibility for the things I'm responsible for.
One thing that has helped me when I've been stressed is to keep a gratitude journal. Each night I list 5 things for which I'm grateful. And in the morning when I wake up I think about the good things that are happening instead of allowing myself to dread the day.
You are in charge of how you feel. It will help if you make a conscious decision to make the best of what you have while focusing on ways to lessen your load.