I am so, so sorry to have "wimped out" on this one! I would normally attempt to help, and to answer questions like this... however, reading your story brought back so many bad and painful memories, I am on the verge of tears just writing this. I was hounded at work for nearly 4 years as a result of my symptoms. What's worse, is that I did not even have an accurate diagnosis at the time, because my Gynaecologist had not noticed, or not acted on 2 reports by other specialists (one in his own Gynae department) who suggested I had Endo! These reports were made in 2008, and I was still in my job at the time. By the time my Endo was correctly diagnosed in 2011, I had utterly given up on work - I don't think I could have faced my insensitive and thoughtless colleagues even if I had wanted to. Just getting up in the morning to go to work made me physically vomit, and I had ended up crying, shaking and being sick on a number of occasions at the thought of yet again having to explain time off for medical appointments, but being no closer to a clear diagnosis! I had experienced more than one occasion where my symptoms had clearly been active during work time (I have very humiliating diarrhoea and bowel symptoms); I'd spent hours in the loo, my employer sent me home - only to discipline me for time off upon my return to work!
I'm really, really sorry about not offering much help. Still, it looks like the other ladies on this site have everything well in hand, and you are guaranteed help and support from them. DO stick in there. DO get your Doctor's support. DO get support if you can from a Union, and talk to ACAS. DO make it clear to HR what your diagnosis is. DO get yourself clued up as to your rights in terms of possible disability, and long term sickness.
I wish, with hindsight, that in my case I had known more clearly what was actually going on. That I had asked to see my medical records as soon as I was concerned about symptoms. That I had asked earlier for a second opinion. That I had not felt obliged to persist, and stick with treatments that I knew were not working, such as the Pill and Mirena. That I had demanded to clear up any confusion. That I had asked sooner for more tests ... ANYTHING. I still cannot say whether that would have changed anything. I mean, at the end of the day, I would STILL have had Endo. I would STILL have needed the surgeries that I have had (maybe not so many, I'm not sure). I would STILL have had symptoms, and needed treatment. BUT at times I do feel that if I could only have explained better to my employers a clear diagnosis that had been confirmed - instead of being, as I was, utterly in the dark about things, and just SO, SO confused... I might still have had the job that I worked SO DAMNED HARD for.
Still, I guess I have no more right to moan than anyone else. As you can see, there are MANY women on here who had to fight for their jobs, and many more who have had to give up work. THAT is the reality of Endo. If the job means a lot to you FIGHT until you can do so no more. And if, after all that, you are still receiving NO support - accept that the problem is NOT with you, rather that you re TRULY in a job that will never change, and working with people who have NO concept of a supportive and inclusive working environment. In my experience, jobs like that are best walked away from. NEVER easy, but trust me, you do NOT want a job that actually CONTRIBUTES to making your illness WORSE.
Again, REALLY SORRY if I'm no help at all. I do feel for you, and I truly wish you all the very best. Like I said, the other ladies on here have it covered...