Hi I Have Been Diagnosed With Parkinsons Since 12 Years

Hi I have been diagnosed with parkinsons since 12 years ago. I am 58 now have given lots of neurological meds. It's been now 4 years where, but now I have severe stiffness and have developed difficulty moving
plus I have IBS and two bulging discs on my back and a knee replacement that was never right. The most debilitation of all this is that I have need to have bowel movements often and many times after having them I can have better mobility. I have been tested for parasites as well like Giardia, Ova and parasites,malaria, lyme disease all negative and the repeated these several times...Tests did showed that I do have overgrowth of intestinal bacteria...have been give lots of reasons but with no true diagnosis. I have periods throug the day that I cannot walk. called freezing...please help I have alot on my plate but need you...thee are othe symptoms but these are the worse...by the way the bowel movements contain What I believe to be bacterial or infectious matter