There is a difference between a fissure and a chronic fissure. I have gotten small paper cut tears in the past that healed up fine without any intervention. But one that is deeper that doesn't heal up after 6-8 weeks can be considered chronic.
I can understand your frustration. It is hard to be dictated by the bathroom.
One thing that I take that seems to help is an fiber/acidopholis supplement called Fibermucil. You can get it from
www.procapslabs.com. I have also started to take magnesium glycynate since my surgery to help with constipation and it really seems to help. But the fiber/probiotics capsules will keep it from being too loose or too hard.
Hang in there, tomorrow will be better!