Let's just say that the toilet cubicle can become your best friend.

I did tell them at work and was extremely matter of fact about it. That said, they could be trusted with that information and I know many people are not like that. Just be aware though that a medical certificate is grounds enough for you to be off work. You do not have to provide further details of what is going on. It is sufficient to say you are having medical treatment.

Best of luck. I know how hard it is. There were times when I was thankful that my job required so much focus and concentration because it stopped my brain running round and round on its little wheel like a mouse.