I actually just took a mental health day yesterday because I hadn't slept much in days, got super hyper and thought I was going hypo (turned out I wasn't, just needed sleep and that I did -a lot). Anyway, I'm one of those people who feels guilty for taking days off due to MI issues, so I very much get where you're coming from. The responses you've gotten are great and have actually helped me too. So let's not feel bad, it's not only okay, but probably for the best to take time off when needed...