Colon Cleansing Pills ?

I’ve been taking Colon Cleansing Pills for several days now because my friend suggested that I start cleaning my colon out, since it contains so much "crap" that can turn your body into a toxic mine. Anyway, I’ve taken them since last Friday, becuase the bottle says to take 4 capsules 3 times a day, I can’t scarf that many down so I just take 4 in the evening after dinner, but on Sunday I forgot to take them so I didn’t have a bowel movement on Monday and I took them Monday after dinner and I didn’t have a bowel movement right after I woke up like I normally do, I had one about and hour after I got into work and then 45 minutes after that one; is this normal for colon cleansing pills? Should I stop taking them? I want to clean my colon and become regular again, I eat lots of fiber, but it seems that it doesn’t help much on it’s own.

Thanks,