Has anyone had success with natural or over the counter stimulants? Apparently there is a shortage of CPAPs and I have already been waiting almost 4 months for one. Meanwhile I am struggling at work every day nodding off and can't get into my doctor until next year. I need help managing. I tried upping my caffeine intake and it helps me not fall asleep but it makes the quality of my sleep worse. I also have to nap every day just to function.