large intestine
I speak from personal experience. I am 35 and have experienced many of the same things you describe, though no tubal ligation.
I believe that you need to cleanse your large intestine. This organ is in close physical proximity with all the female organs and when the colon is clogged with excess waste, it swells, presses on these other organs and prevents them from working properly. This can cause all of the hormonal imbalance and fluctuations you describe. I had almost immediate relief when I began a series of enemas at home using my own urine.
I would also suggest you make some corrections to your diet to reduce estrogenic foods. You should not be eating any form of meat, sodas, fast foods etc.
If you are interested to learn more I will be happy to post the enema protocol that I used to correct these problems (given to me by an Ayurvedic practitioner).
You can read a bit more if you like about my story here:
//www.curezone.org/topic/inthelight/default.asp
though it doesn't include much about the hormonal stuff, which I have been learning more about since that time.
Best regards,
Janaki