Unfortunately, Phoenix I have, because I can get that way with a mixed episode. I haven't walked on broken glass (as an adult) but I have punched myself hard enough to give myself a black eye, and I wish I could forget the things I have said...
I think it actually is more psychotic like when the person who is sick doesn't really get what is happening. I found with time I can recognize when I am heading for a bad space and can take some precautions. I realize that I am fighting a crash right now. So, I have to give myself space, sleep enough and really let up on the stress. It does help the sprial from really taking off, even if the downer still leaves it's mark. Before, I would have simply crashed and burned.
(((((Amy))))) I am so sorry you are having to deal with this. Your mom is still there, but it is a bit like dealing with any episodic illness, migranes for example. Stressfull times and other strains on the system will make her less herself. She will need help and understanding to pull through, and though I admire your patience and your love for your mom, please do not allow yourself to be abused. It will hurt your sense of who you are and lead to bad feelings between you. Not to mention add more things for your mom to regret when she is better. Huggs, and I really hope that the docotrs can help your mom be stabilized soon.