I have had yellow looser stool for  2 weeks now. It also has a very distinct smell no matter what I eat or drink. What can I do?

Stool culture. See a physician and get a stool culture to rule out a serious infection. Possibly urine in stool from a fistula or some serious bowel pathology.
Doctor and Probiotic. You should be evaluated by your doctor, but in the meantime you may some symptomatic improvement with a short course of probiotics which are available otc.