Is constant diarrhea normal after gastric sleeve surgery?

I'm almost 2 weeks postop and no matter what I eat whether it be broth or sometimes even water, I'm almost immediately in the bathroom with several follow-up trips within the half hour. This is making it very hard to get my proper intake of protein and liquids that I need. My surgeon said it was normal and to keep drinking and eating but I'm very tired and weak. Any advice? Thank you.