Sounds to me like some pills or vitamins. I know after my big surgery that was the Deloyers procedure, my potassium was way low, so they made me swallow all these tablets over 2 days. Once I got home, guess what started appearing in the toilet, looking like Smarties? Those stupid pills. Freaked me out at first, until I figured out what they were. When I told the surgeon at my follow up the next week, he laughed and said, well those didn’t do you any good!