The first 2 weeks are always the hardest

You body is adjusting to a new fuel source and you are detoxing your system.

You didn't say how much water you are drinking. Minimum you should be drinking a day is 64oz plus 8 oz for ever 25 pounds you want to lose. It sounds like a lot of liquid however if you were use to drinking 5 or 6 cans of pop/soda a day that is around 64 oz

Nothing replaces water I might add. If you are drinking coffee, tea, diet sodas...you still need to drink 64 oz of pure water. (hydrating your system will also help with the bathroom problem)

It takes water and lots of it to flush the fat out of their storage compartment. So drink up!