Well your pdoc put you on it for both sleep and Su. If it's what is helping you sleep , well then you will probably have insomnia if you stop it and if your sleep is outta wack its most likely going to fool with your BP in a big way. Bipolar is just a messy mass of shyt to sort out.

Are you taking it early enough at night so it has time to do its job and then you can be up and running in the morning?

I would proceed with caution. Try to be seen sooner and just be honest about how much of an effect this medication is having on your ability to enjoy life. There are many options. Don't settle, It takes time to find the best med or meds that will be the best for you. Be your own best advocate.