doing colon cleanse, changed to mostly veggie diet, having diarrhea, blood in stool, wont go way !

started a Colon Cleanse 1 month ago (colonix - dr natura)
have done it once before with only good results

however this time i did make a big change
i have mostly stopped all meat chicken and fish

am eating alot of soy and tofu ( soy yogurt, tofu dogs, humus, soy crisps)
some fruit, no gluten high fiber breads like ezekiel and manna and pumpernickel
some veggies like cabbage, spinach broccoli

have had increasingly worse diarrhea for the past 12 days
sometimes there is blood in stool or on toliet paper
sometimes stool is formed but there a bunch of little pieces
other times very watery
past two day i am having slight abdominal cramping and last night woke up three times to go to the bathroom each time it was watery and almost nothing there

i am very regualr in the past
wake up and go every morning
well formed stools
always go twice a day