same to me ffx3..
after having three dose of antibiotic lincomycin..
I have had this same situation for more about 5 years now. Several tests done (stool, colonoscopy, etc), nothing that could cause this. One doctor suggested it is the internal hemorioids that I have that are causing it. They have no clue what it is otherwise
My theaory, I was put on antibiotic to a trip to Brazil, upon return I had problem issue (good bactera gone), ever since it hasn't been normal.
Mucus is normal with stools, but it's typically clear in color. The change to white could suggest more than normal production or it's possible it could reflect the presence of an infection-fighting process of some kind. If it continues, you may want to check with your doc and get some stool testing done.