Hi Michelle,
By all means, go talk to your doctor. Hopefully you can talk to someone who's educated about WLS, or is willing to consider talking to you about it with an open mind. I was really surprised when the first doctor I talked to about it was so supportive. I was sure I'd have to convince them that it was a good idea and was ready for a battle.
My next advice comes from having been in your shoes. It sounds to me like you need to take better care of yourself. Sweetie, if you're working 30 hours a week at night and taking care of two little kids during the day, of course you need sleep! It sounds like you're being pretty hard on yourself because of the extra weight. I know I was extra hard on myself pre-surgery because I felt like I didn't deserve any better. Afterall, if I couldn't respect myself, how could anyone else. My role was to always take care of everybody else and I always came last.
When I decided to have surgery, one of the best things I did for myself was to consciously do something just for me every single day. It didn't have to be big, it just had to happen. I actually declared 2004 "The Year of the Chickadee" and decided to really, really take care of myself for once. I practiced saying no to things I didn't want to do and started working on doing things for myself instead of always putting everything else first. That doesn't mean that I abandoned my family or anything, just that I also considered my own needs in addition to theirs. Once I started doing that, I was able to take the time to research surgery, make the necessary appointments, and ultimately have my band placed. That attitude also helped me get into regular exercise, because I no longer felt like I should be doing whatever it was that was more important instead. It has also helped me make better food choices. Sometimes (not always though

) I'll stare down a Twinkie and think that an apple really would be more satisfying, because it comes down to taking care of myself.
So, I guess all this rambling is suggesting that you take care of yourself - starting now. WLS is a wonderful, wonderful tool that you sound deserving of, but you've got to be willing to make changes to make it work. You're worth it!
Chickadee