Oh wildflower, I'm so sorry that you're in this emotional state right now
Is it too much or too little celexa? If you know it's the celexa, make sure you tell your pdoc! Hopefully she'll change it again, because we take meds to help us get better, not to make us worse!!
I am glad that you aren't going to act on the thoughts. It's so frustrating when you can't get rid of thoughts you don't want to be having, isn't it?
If you can't sleep, got any chores at home you can do? Or sit and read a book and tell yourself that you can't do ANYTHING until it's done? Read the entire book with only bathroom breaks. Get a big glass of water and a snack sat down with you before you start reading.
Even if you can't focus on the book, park it and read the whole thing anyway. If you're a quick reader and you finish it before you're feeling better? Then go on to the next one!
If nothing else... it'll keep you still and somewhat occupied. *hugs*