You asked how you were going to feel taking the remeron,
Xanax and Lunesta at the same time. Sorry, but
I have no idea. Even if
I had ever taken that combo before, how it made me feel might be totally different than how you feel. The only way you'll know is to try it.
You also asked if it was a safe coctail. Giving your p-doc the benefit of the doubt, I'll go ahead and say that it's probably fine.