Another one here with a child with additional needs who understands how overwhelming it can all feel. I'm really sorry you're having such a tough time of it, OP. Headed to bed this end soon but just wanted to offer you a handhold,
You've probably heard of this before, but this can help if you're feeling really overwhelmed or panicky;
Try to find somewhere you can sit comfortably and quietly, and then try to find 5 things you can see (your hands, a painting, the sky, etc), 4 things you can touch or physically feel (your feet on the ground, a rug, soft bedding), 3 things you can hear (road noise outside, trees blowing in the wind, your breathing), 2 things you can smell (soap, fresh cut grass) and 1 thing you can taste (fresh air, gum, coffee). It can help redirect your mind to the present and away from everything that's making you feel down or anxious. Don't know if that helps at all, but I hope it does. Sending you a big hug 