I wish IBS was recognised too in this country as it is in the states. Its very difficult to work with that too as often I'm in and out of the loo eight or ten times a day 
The combination of IBS, menopause and extreme exhaustion led me to claim my teaching pension early and retire completely after several years of just doing supply. I went through a period of time when I had sudden emergencies several times a day and that does not go well within a classroom.
' Sorry, children, play amongst yourselves while teacher runs to the toilet!' doesn't quite cut it!
Very stressful, even when my digestive system was calm. It was the fear of having an accident. I didn't get any support from my then GP, other than to check there was nothing sinister going on. It seemed that if they can't see anything, it didn't exist. I have experienced more support in the last few years, if not any answers.
I do wonder how I would have coped financially without my DH. Because I have been unable to work full time for many years, my teaching pension is small, though welcome, and of course, my state pension age has been pushed back twice, now at 66.