I agree with Buttgirl - if you have constant pain and have trouble to pass the gas you DEFINITELY have the spasm. It is unfortunate that your doctor is ignorant - same here - most of us had to change 3-4 CRSs to get some relief.
I had LIS and pain was gone immediately - I could not believe it !!! Even my first bowel movement was almost pain free. I had a very happy life until 3 weeks ago when I re injured the area with some semi-hard poop, but you know what - even that I am now sore from that it can not compare with my pre LIS situation. I can function completely and pain is mostly present during pooping and even than maybe 20% of original fissure pain.
If I were you I would search to reasonable CRS until I find one !
I wish you luck and fast healing
