Thanks for your replies, paine and Ponder. paine, I too have been thinking about opting for surgery, but keep rejecting it, especially after reading some of the posts on this forum. Ponder, I also have been looking into the natural approach to healing this awful condition, as I'm increasingly concerned that in conventional medicine there doesn't seem to be a proper cure for it.
I've found that getting involved in other activities, thinking about other stuff, work-related or not, helped to get my mind off the pain and discomfort, and for several months I almost forgot about it - almost, but not quite, and then it returned with renewed force.

At the moment I'm trying to continue my work - I work from home, luckily - but am having to deal with the problem of sleepless nights and varying degrees of pain. At present I find the most effective physical treatment to be warm baths, but I don't use coconut oil as I appear to be allergic to it, it causes irritation. Creams like diltiazem also seem to irritate my backside. I've continued to take Pregabalin combined with a low dose of amitryptaline, as I find I do get some relief from pain that way. Movicol (Miralax) and lactulose help to some extent to keep the stools soft, and I try to remember to drink enough water each day.
Ponder, I sympathize about unsupportive GPs. My own GP kept sending me to consultants, trying to establish whether I had prostatitis, Crohns or UC, and it was months before he would admit that my problem was a series of anal fissures. But then, I'm in the UK, and don't have to pay for treatment, so at least I don't have that problem. I did go private at one stage about a year ago, but it didn't produce much by way of improvement - I found that I was shunted between various specialists - a gastro, a urologist and a CRS - none of whom was really prepared to take me on as a patient. Though I guess I ought to thank the CRS for arranging my sigmoidoscopy and 2 MRIs to be done on the NHS, so that I didn't have to pay for them.
Sorry to hear about the gall bladder operation - that's exactly the kind of thing that scares me. The claim that AF is essentially beyond cure sounds reasonable.
It seems that because AF isn't life-threatening, it's not really taken seriously by the medical profession, even though by some doctors at least there's an acknowledgement that the pain of AF is at the top of the scale.
Ponder, hope you can get some rest and sleep!
I'm also Dave, by the way.