Day 5 - Need to share and understand a few things...

I am on day 5 now and am feeling incredibly sluggish. Does this subside? Lucky enough, I haven't experienced the headaches yet - but presume I will. I am barely drinking down 6 10oz glasses, so my water intake has been lowered. My question is, do I factor in the Master-Cleanse shakes as water intake as well? I have pretty regular so far, which is good - a friend of mine suggested I do an enema at the same time - is that good advice? Also, when should I expect to see stones? I love this forum and appreciate everyone that reads, responds, and offers support - It makes all the difference!