SL, what's going on with your mom would be stressful for anybody. For people like us it can be crippling. You have to give yourself a little room to be emotionally out of control right now because it sounds like there's just too much there to manage. Give yourself a break, ok? Don't worry about how your emotions are effecting others right now, just be gentle with yourself and try to get through them.
I hope your mom is doing better and that you are too.
Cyran0