Knee pain, bloating, gastric problem.

I have knee pain for last 2 month and also gastric(but not heartburn), bloating problem and stomach ache(after meal) for last 7 month...after taking meal I feel bloating and stomach ache...since last 1 year whenever I drink turmeric milk at night then I feel gastric problem and  unsatisfactory bowel movement next morning... before 1 year whenever I used to drink turmeric milk I had full satisfactory bowel movement but for last 7 month opposite is happening.. whenever I eat pumpkin seed I feel urge to urinate despite urination and feel unempty bladder... whenever I take orally multivitamin tablet like neurobion forte,keraglo eva etc I feel bloating and gastric problem upto 5 days...why is it happening??