I sort of agree with AS, but I think it is more of a case of teachers and the boss acting on hearsay. If you go to the docs and get the letter then he/she may be able to tell if you're depressed and act on it. Sorry AS, I know you're a vet on here but at the moment that's what I believe is happening.
Do you think your boss is trying to sabotage your transfer? What is your boss normally like to work for? Has he changed since you and your W separated?
As you know, some people's attitudes change when you split up from your partner. I've lost a few friends since my H left me.
It could be stress or lack of sleep that may sometimes affect you negatively. Go and have a check up anyway, it can't do any harm smile Some people can't cope with the sitch and this could be the case with your boss and the teachers.
Just another thought. Have any of the teachers started acting different to you or is there anyone who backstabs amongst the teaching staff? I've worked at schools before and you do get backstabbing at times and rumours spreading.

H47 me48
T22 M21
S20 - Got high functioning autism
3/2000 H admits to OW and moves out to live with her
11/2000 H moves back home
2/4/13 H moves out
H tells me he wants D 6/13, but now he can't afford to!