When I took my first dose, it upset my stomach a bit. A day later, I was visiting the bathroom a lot. 2 weeks into it, it no longer upsets my stomach and I don't use the bathroom nearly as much.
The first week was a little brutal as my body was starting to adjust to things. I had cramps, frequent usage of the bathroom, and with the prostate apparently shrinking, I felt there was a lot of ... pressure. And with all of that, I'd cry at the drop of a dime.
That's all subsided completely now.
Stick with it and talk to your doctor. She can help you if you have any worries.