I'm in a similar situation. I work in a primary school and have been off with a Dr's note which is expiring on the 12th. I asked my nurse for advise on returning and she asked my specialist who asked my specialist and he gave the go ahead to be back in a classroom which I thought was strange. I think depending on who you talk to you get different advise. I definitely won't be in a classroom, I've requested to work doing paperwork etc for now away from people