Tendonopathy, which is the only working diagnosis that makes sense, does not have a well defined cause.
One thing we can say.
Stress, physical and mental, and the other postulated factor is toxicity and with weight gain both of these happen.
In addition you have components of fibromyalgia.
If you are hypothyroid, this can contribute to the problem as well.,
Your rheumatologist should have done an ANA panel and a sed rate to make sure there is no indication of connective tissue disease, along with a rheumatoid factor.
if this is clear, and the thyroid is clear [if not it needs to be treated, then the following are needed.
Nutrient dense diet.
The diet, in order of preference in quantity, should look like this
whole fruit, beans and peas
Whole grains no yeasted breads, dry cereals or anything refined
Seeds and nuts, but cut out seeds if you have any diverticulosis.
A little tofu or tempeh daily
A little high quality soy or coconut milk yogurt
The soluble fiber in this strategy will stabilized colon function in about 6 to 8 weeks, then about 2 or three helpings of animal foods a week, preferably fish, can be added back.
See the book Eat to Live by Dr. Joel Fuhrman, for instructions on this type of diet.
Next a magnesium level needs to be checked. This is a common relative deficiency, especially in the US but everywhere now.
If it is below 2.5, it needs to be supplemented.Vitamin D
needs to be checked, if below 40, supplement [also a common deficiency with multiple effects.
A graduated physical therapy
program is needed, and it should be designed by an MD of physical medicine and rehabilitation.
Savella, lyrica or cymbalta can help with the fibromyalgia aspects of your case, but I prefer to start with medical acupuncture.
I suggest you find a practitioner [MD or DO] versed in all of this: that would be here: www.functionalmedicine.org see the find a practitioner link, upper right.
Good luck Robin.
Let me know how it goes.
Please let me know if you have further questions.
Please don’t forget a positive rating.