Well, my circumstances are a little different.

I went to work full-time, while using my Trial Working Months on SSDI. I did NOT disclose my status to my work. After a few months I could not do the work anymore and gave notice. They asked me to stay on as a contractor and work on some projects. I did that for about 6 months and they kept wanting more and more hours out of me (more than I could mentally handle) so I emailed the owner of the company (it's a small business) and told her EVERYTHING: bipolar, hospitalizations, ECT, all of it.

She was very understanding and offered me a low-stress position at 10-12 hours a week. I am allowed to take off whenever I want for bipolar-related reasons.

I'm very lucky. I don't know how this would have gone if I had disclosed earlier. Generally, I do not recommend disclosing.