Don't stress over your diet...it sounds pretty good. Stay away from the sugars, too. Obviously, the 'cleaner' your diet is the better your results will be, but you can still expel plenty of mucoid plaque with a less-than-optimal diet...even some indulgences here and there.
Psyllium is a completely soluble fiber...which is actually one of the reasons it works so well in the colon cleanse. But this is also why drinking plenty of water is so important. I've used flax fiber and it doesn't produce the same results. Ground flax seeds are great to use on a daily basis to keep the bowels functioning well, but to clear out mucoid plaque...nothing beats psyllium!