B., I know others will disagree with me, but truly, I just think that you need to study for a career where you will make money. You have to work the same hours for less pay in your CNA job than you would have with teaching. Teaching is really hard the first two years or so, but then you have your lesson plans set and know what you're doing. Could you see your way through to possibly reconsidering? You and your son's future would be easier for it. You could possibly move out of the classroom, given time, and work in admin if you get to know the right people. You could be a reading specialist, which is more of a pullout program, or studying ESL which has fewer children in your class.
You could also start working in a private or parochial school to get your bearings (less money) and then move into a better paying school district.
Working with children is certainly not the same as caregiver work, though it is related, but if you major in early education, the kinder kids aren't SO different than the pre-schoolers you're working with.
I know this isn't an answer to your question and my remarks may not be welcome. And I know that you've seen a part of teaching that you don't enjoy - indeed, it's not for everyone. But it seems to me that a part of the caregiving that you desire and lower ages like the preschoolers that you don't seem to mind, or pull-out programs like reading specialist or ESL might "get around" the aspects that you don't enjoy.
You also seem to be burned out already by studying for work that pays a lot less than teaching, and doesn't have good benefits either. You and your son need good benefits (as well as a better schedule.)
I know it's hard to think along these lines when it isn't what you want. But if you could do it, it would be easier in the longrun for you. My mom did it with 3 little kids when she was in her 30's. It was SO hard, but she kept her eye on the prize for what her family needed. She taught kinder and first grade for 25 years so she had good medical benefits and a decent retirement. She's never been sorry.
Good luck in your decision.
Dawn