Your skinny turds means that there is not much room for anything to pass through. Yup, you have a classic case of severely impacted intestines. I see that you are making progress in that your diarrhea has morphed into long, thin turds. :-)
How often do you take the psyllium and how much? I take 4 level teasp. 3 X daily of the psyllium with excellent results. I started with 2 level teasp. 3 X daily for about 6 months. It can take a year or two of daily regimes to unload old feces and mucoid plaque, we all have it because of the wrong and processed food.
What is your diet? Do you eat junk food? An excellent book is Robert Gray's "The Colon Health Handbook'.
You are on the right track with psyllium. Keeping a good diet, drinking lots of water and staying with daily psyllium is all that is needed to shape up your intestines. Good Luck, Giz