Good news. Most of us on this board "are in the system." You might get some of the trolls, but the longer answers won't be put downs.
SSDI encourages us to go back to school. They have something set up to help. (It's taking out some of our money and saving it for us which I can't afford, but it does show they are encouraging us.) So, that' you're in school won't kick you out.
That you improved is good. Everyone wants to improve. The question isn't if you have, can you, or will you. The question is "Can you make more than $1040 a month?" (Okay, not the exact question, since the amounts go up every year with the cost of living and I haven't checked what this year's amount is, so that's from last year. It still gives a rough idea of how much you should be able to make, before you no longer qualify.) Can you work? If you can't. You stay on. If you can, you don't. Then again, if you could, why would you be back in school trying to figure out a way of making good-enough money? You'd already be making good-enough money, right?
It's hard to get on it, but because of that, once you're on it, they know you proved your case. They don't kick us off for trying to get better. They kick us off for getting better. BUT, more likely, we kick them out, because we don't need them anymore.
Added advice not asked for: Someone taught you something very wrong. Someone taught you that you are useless and unable to take care of yourself. Good for you for rising above such foolish lessons, but the damage has been done. Rebuild one victory at a time. Give yourself the time to admire yourself for every goal you've achieved. AND, those goals? The big goal might be graduating, but you have just as big goals with every course you take and graduate from. Count them as the big victories they are. Count your child as a big victory. Count you raising your child as victory after victory. You're learning you can do more than others expected. Make sure you reinforce that new message into yourself at every chance, because you only have a few years of victory under your belt but two decades of defeat (or trying to make you feel defeated.) You're building a new image of who you are, make dang sure you notice the new you, so the old doubts never defeat again. The Colosseum in Rome was built on ruins. Make the new you a Colosseum - aware you're building on ruins, but standing the test of time.