Hi Anissa!
Congrats, you're almost there! Where are you having your surgery? I've definitely had similar thoughts-- especially ones about "not waking up." My boyfriend actually had gastric bypass 2 years ago and I asked him how he dealt with those thoughts. He said "the way I saw it, I was already dying." It's morbid I know, but it made me feel better somehow. This isn't something small, it's not something you're doing lightly or flippantly. You're doing it to get a new life really, and I don't think anyone would be angry at you for that.