Sounds like you've got a lot of gunk coming out, now is the time to do more to get it all out, and yes it is crazy that we let our bodies get in the condition to house parasites/worms in the first place. Thank God it isn't too late to get ourselves cleaned out but good! ;)
The baseline for a colon cleanse is a minimum of 30 days on IF#1 and IF#2. The length of the cleanse will vary from person to person. For example, I've eaten junk for most of my adult life and before I found this forum I had never done any kind of cleansing at all. I can't expect one 30 day colon cleanse to completely clean out 30-40 years of built up fecal matter that is stuck to my colon walls. I expect to do several 30 day colon cleanses, but for someone who has been eating healthy it might not take as long.
Have fun cleansing and know that you're doing something GREAT for your body, you'll feel so much better once all those nasties are out of you!