Some people take several weeks on the shakes before they start to see anything significant...and some bloating is pretty common in the beginning, but will subside as you start passing 'stuff'. You could give the Epsom Salts a try...but expect to have diarrhea...it is very potent. Make sure to drink plenty of water if you use it. Enemas or colonics would be a better alternative.
I went through a full training program for colon hydrotherapy and also have a doctorate in health psychology. A lot of what I know, though, was self-taught as a result of my own health challenges.
Bursitis is an inflammatory condition...any cleansing should be beneficial. Also, make sure that you are getting sufficient essential fatty acids...omega 3s....and you might want to try an herbal anti-inflammatory like turmeric. Make sure that you are using digestive enzymes too... food sensitivities is often the culprit.