I've recently been prescribed NuVigil for a host of sleep problems. Overall it has been wonderful but I've just started noticing over the past 2-3 days that I wake up with my heart racing and I have an intense anxiety. I was taking Adderrall as a stimulant in the AM but have weaned myself off; I would've thought IT would be the one to make my heart race but as much as I otherwise like the NuVigil I'm not sure if these symptoms aren't just trading one problem for another. I don't know which is the lesser of the two evils. Anybody experienced this too? Suggestions?