Well, this is embarrassing! 61 year old white female. In last year I have changed my eating habits to more healthy choices, and exercising. I have lost 50 pounds since 1/1/16. Feeling much better, however, the last 10-14 days I have noticed what looks like coffee grounds on my underwear. GROSS! I did have a experience of pretty painful constipation last week, for several days, but has now improved. I do have a history if IBS. Should I follow up with PCP?