Wow. You sound exhausted. I've totally been there.
Consider telling your Mom. Would you want your 6 yr old to come to you?
Meds are a tricky thing. When I first started taking them, I would stop after awhile (I have BPII as well, among other things). I finally learned that I needed the meds to keep my mood more stable. It can make a difference to stay on them. It would be more beneficial for you and your daughter if you could get out of the constant depressed state a PBIIer lives in.
Have you considered making plans for your daughters care and just go to an ER? It takes a person with serious issues that can not be resolved to be 'locked up' long term. It sounds like you are very capable of communication, knowing your thoughts and being in touch with your feelings. In the hospital, you can rest a bit and get focused again. They will also help getting you back on the right meds for you. It is surprising how inspiring it can be to get around others who are having similar thoughts and feelings as well. It is sort of ironic, but stays in the hospital were very important for me. It may be a good choice for you.
Hang in there! There is light at the end of this tunnel.