Day 6 - Feeling lethargic

Day 6 on the P&B cleanse ... I am doing 1 shake per day with 75 oz of water throughout the day. I weigh 150 lbs, down from 175 lbs when I was first diagnosed with Crohn's Disease 7 years ago. The weight loss has not been good considering that I was once an athletic, 5'11" tall male. Now, at the ripe old age of 28, I have an unhealthy thin look, with some bloating in my abdominal area. I can swear that I have also been shrinking in height - now I am only about 5'9" tall ... yikes! Today I am feeling very lethargic and have developed a number of sores in my mouth - probably related to the cleanse. The abdominal pain has been excruciating, but, given my medical condition that is actually not unusual. I had 1 bowel movement today, and it was not very healthy looking. So far no mucoid plaque, but I am keeping my fingers crossed, trying to keep a positive attitude....