I'm sorry I mischaracterized what you said, when you clearly noted it was NOT diarrhea. Hmmmmm. Soft and often, that's right. But the rest of what I said remains my advice and I hope it was somewhat helpful.
To clarify:
It's not diarrhea. Just very soft and often. I've had diarrhea & what I deal with on a daily basis is not that.
Hmmmmm. Well, antibiotics usually dry up waste, so for you, that was a good thing. I'm sorry, but I don't know why your waste is so watery...diarrhea can be caused by a lot of stuff, some serious and some just poor lifestyle habits, takes a doc to make a diagnosis. Soooo, in the meantime, to make you "dry up," I suppose you could take an over-the-counter antihistimine maybe, like Benadryl, it'll dry you up, but they also make a person sleepy, so you could take it at night if that happens. But plez visit a doc and find out how come you have a lifelong tendency to have diarrhea. I mean, could be something as simple as you are allergic to milk or something.