I've had diarreah lately too, and I think it's the OP. I've been OP 3 times a day with coconut oil. I'm not sure if I should go back to Sesame for a while or what. This is my 5th week of oil pulling.
I love OPing. I don't think I want to stop it or even do it less. Maybe i'll just keep at 3x daily and hope the runs quit. :-)