You looking to flush your intestines out? Sounds good...
If you got some NAC powder, 5 days on with 2days off for a month should help cleanse your liver...THat will be a good start...
Next, get some high quality Chlorella tablets. Dont get powder form, most likely you wont be able to down it because of the bad taste. High quality Chlorella tablets should be able to detox you VERY nicely...
look for minimum dosages of 250mg to 1000mg per tablet...You'll need to take 1-2 grams a day for the first week or so, but then start increasing your dosage by say 1gram per week? You shouldn't need to go over 6grams or so a day. That should be an effective dosage to cleanse out the intestines, you may notice more stool.
Not to mention it will help eliminate heavy metals from your body like Mercury and Pesticides, after 2-4 weeks you should start to notice increased sense of well being and energy, that way you'll know its working. Also keep an eye out on your skin, skin should get more cleaner as your systems cleaned out it'll show up on your skin as a sign of good health.
Just one more thing, when you get the chlorella tablets, try look for whats called "Cracked Cell Wall" chlorella. It can take upto 3months to get your digestive system and other organs running nicely with the Chlorella. Hope this helps you