Maybe you need to speak to your doctor about the grogginess from taking Lunesta. I think it you need to lower the dose (maybe in half?) and consult your doctor the next day. It's not safe to be falling asleep when you're driving.
It sounds like you're experiencing a lot of anxiety, though. Is there any way you can take a walk or do a physical activity? The activity doesn't have to be hard, but exercise helps reduce stress by releasing endorphins, naturally. Having sex helps, too. Another thing that helps is having a bed time and sticking to it. This means you have to turn off all electronics, unless you need some background noise. I can't sleep in silence, I get scared.
http://forums.psychcentral.com/showthread.php?t=251167
^ Good topic discussing sleep.
I think you will be fine. It is scary now, but that is because you're facing something new...yet old. Continue posting here and you'll learn through other topics more coping mechanisms. If you have insurance that allows it, you may want to see a therapist. I saw one on/off for several years and the help they gave me was invaluable.
REMEMBER!
YOU are Little Me. NOT Bipolar. Refer to bipolar as something that is a part of you (because it will impact your life) BUT it does not encompass you. YOUR feelings are validated and never to be questioned. Open your heart and communicate your issues. This includes using support websites, having a therapist (if needed), having a pdoc, communicating with your husband and teaching your children about the illness. Try to teach your spouse as you learn and if it is necessary see a couple's therapist.
Conquering bipolar (aka managing it) is done through communication. Talking and connecting with people help. Communicating reminds you that other people suffer the way you do and that there are things that can be done to mitigate moods. Enjoying your life and not hiding from it helps. Don't stop doing things you're passionate about.
I wish you luck.
Also sorry about my last post on the other topic, it kind of devolved because of me.