Deciding when to retire

I’m having a hard time deciding what to do about work. I realise I’m the only person who can make this decision but would love to hear from anyone else who’s gone through medical retirement. Some days are ok, others I’m exhausted and can’t think properly, then still have to come home and make the tea and be there for my children. I work in healthcare and have to be on the ball. I’ve been plodding on and ignoring the issue, now need to decide if I give up and try and get pension and income protection to pay out, or try to do something else more manageable. Anyone got a crystal ball I can borrow?