Bee - I think no one here believes she/he can survive this at the beginning. I know I certainly felt that way. But, we start with small steps and trust me, soon, those steps will turn into strides and somehow our shoulders will straighten and we better ourselves all the while forming this interior steel.
Regarding your old boss, although the conditions aren't such that you want to jump jobs, it is a huge positive that you are so highly sought. Savor that; that's all you!
Keep going!
Me 41, H 47, M 15 yrs, S11, S13 BD 1: 11/4/14 we work on it; really I pretzel myself BD 2: 3/31/15 H goes down to "dorm room" 8/15: H back to MBR 10/15: H back in dorm room 1/18: H files, now divorced