Ellie,
I'm so sorry you're having such a terrible time. Isn't there some way you can call the pdoc and let him know you have an emergency. You really are sounding like you need immediate help and there has to be some system in place for them to squeeze in emergencies.
Don't feel bad about
the kids. It's okay for them to see you cry, and you do take care of her. You hold yourself together most of the time just for those kids: it's no surprise that sometimes things break through. They'll be okay and so will you.
I'm not sure how a doc will resolve your anxiety issue. Sounds like a separate anxiety med is in order, but you know, I don't know what I'm talking about
really.
Hang in there, vent if you need to, and we're here if you need us.
((((Hugs))))
serafena