Hi, Yaowen -
You must be Wonder Woman to live through all of your challenges every day! I hope you know how to acknowledgment for that, by recognizing each of the examples of taking care of yourself. Submitting a question on this forum, sharing your situation - which took courage just to "admit," - and considering the idea of continuing with schooling.
First, do you know what the fear is about? Are you afraid it will be a waste of time? That following through on it won't accomplish what you need it to? That you aren't up to the challenge because you're not smart/skilled/disciplined enough? And one that I face often: "How will I feel about myself if going back to school turns out to be another method of distracting myself from areas of my life that are too overwhelming?" I find that I put lots of "food" on my plate that looks good in a buffet, but that I don't really have enough appetite to actually eat. For example, right now I'm reading three books, working on a novel with a writing coach,, getting into a voice over career, and starting a business in doing natal astrology charts. Oh - and I just joined this community and look forward to posting. There aren't enough hours in the day!
So I suggest you ask yourself these questions:
"Do the requirements of my days leave me enough mental and emotional wherewithal to enjoy classes?"
"Am I really interested in learning the material of the class I'm thinking about taking?"
"Have I gotten feedback from folks who are taking/have taken this class/enrolled in this school so I know what to expect for. the amount of time required to do the work? Did they think it's a worthwhile course/company that's offering it?"

Asking myself questions has been my best recourse for trusting what I'm thinking about doing. Doesn't always work, but it's always informative!
Remember these points: I'm doing the best I can." I don't need to add anything to myself to be a better person." "I trust my deepest feeling 'lie' detector when I question myself." "Is it helpful to pressure myself to make a decision RIGHT NOW?"
Take care of yourself!
aishasolo
There are always alternatives for how to arrive at a goal.