Hi Morgan. Welcome to the forum! I can certainly relate to what you describe. I was diagnosed a number of years ago with sleep apnea. Prior to diagnosis and treatment, I fell asleep while driving. Thank goodness nobody was hurt, but that was my wake up call to talk to my doctor about how tired I was. I had a lot of difficulty staying awake unless I was moving around. It was not uncommon for me to fall asleep if I was doing anything that required me to sit still. I almost never made it through a movie, and I often fell asleep while reading. Treatment definitely improved my ability to stay awake, and I am much less tired now that my sleep apnea is treated. Losing weight seems to be easier because I have more energy, but I would not say that treatment of my sleep apnea actually caused weight loss. My general mood also improved quite a bit. While treatment for me was initially challenging, I eventually succeeded and have used my CPAP for well over 10 years now. Best wishes with your second sleep study, and please keep us posted on your progress. The forum is a great place for support if you have questions!