I remember your background @Former-Member - we chatted about it when you first joined here 
My 'backstory' is pretty similar - except the catalyst wasn't an incident at work but my illness. Similar to you though - all those things I had been suppressing (or keeping locked away) came to the fore in a hurry when I couldn't do anything physically to occupy my mind any other way.
I too am in 2 minds - being there today - even though there was only 2 other people there (and one was my mum) really made me question if I would ever get back to work and also if I wanted to go back. I really am stuck! I know I am not well enough (an understatement!!!!) but is the questioning beacuse I am still so unwell or can I really cope in the system we have now longer term anyway (if I do manage to get back).
I just don't know 
@Zoe7I completly understand the 2 minds part. I think it was extremely brave of you to even go there today. I only live 15 mins from my work and have to go past it to get to my mother in laws place. I purposely go the long way b/c I cannot even drive past it atm.
It is ok not to know @Zoe7, we don't have to have all the answers now. I have realised that I just need to take each day as it comes and if and when I am ready to go back to work, I will cross that bridge when I get to it. You are dealing with so much at the moment hon. Take the pressure of work of your shoulders. Put it on the back burner for now and we can cross that bridge when we get to it 
Every school has their 'challenges' in different ways @Former-Member kids are kids - no matter where the school is or how difficult it is to work in. If we treat each child as an individual then we find that there is so much more to them than just a name on the class list 
Sometimes we find the most academically proficient have the worst background or the 'naughtiest' kid is able to do the most amazing work when they are not bored - every child should be treated as special and worthwhile.