I am sorry you are in so much pain! It is because your body balance is out of wack from the hormones you were on, that you are no longer taking.
My experience with Chinese Bitters is because I had read about it on a website somewhere. I thought it sounded good and it was harmless as it was all natural. Well, I decided to ask my Chinese Doctor about it and he explained that it depends totally on the person. Chinese Bitters won't work if your body is experiencing the "cold" as described in chinese medicine. It will work well if you are experience "heat". So, I would go and see a chinese doctor to get a diagnosis on what you are first before taking anything.
We are all different so it may not work for you.