Suggest Natural Remedies For Prolonged Diarrhea

I am a 56 year old female with diarrhea lasting more than a month due to what I think was Mobic prescription for 30 days for tendonitis in my foot. I have not taken Mobic for over a week and the diarrhea persists, with un digested food in the mix, as well as an urgent need to go about 30 minutes after eating. I eat organic foods, grass fed beef and free range chicken, avoid sugar and substitutes, have entree salads at least once a day with olive oil and vinegar. I do not eat fried or fast food. I have tried probiotics and kefir to get my gut flora healthy again, but nothing seems to help. I DO NOT want to treat this with yet another prescription medication that will cause other unwanted side effects. Any ideas for a natural solution?