Welcome to the forum.
First, reacting to the title you chose for your question, fingering rarely if ever transmits HPV. However, anal HPV is pretty common in heterosexual men, with no apparent anal sexual contact at all, and some anal HPV infections can cause cancer. It is rare in heterosexual men, but it happens. In the event you have (or someday develop) anal cancer, you will not be able to attribute it to any particular sexual exposure or fingering event.
There are no STDs that cause the GI symptoms you describe. The single aspect that in theory could be STD related is the anal fissure, mostly because herpes is a rare cause of fissures, and anal cancer could also cause a fissure. However, anal fissures are common, everyday problems in people with none of these problems, and also occur with increased frequency in people with various GI problems, like Crohn's disease and irritable bowel syndrome. These esplanations are far more likely than any STD.
Finally, your other symptoms -- bowel function, armpit pain, low lymphocyte count, and so on -- are not suggestive of any STD. For sure they have nothing to do with HPV, and anal cancer would never cause such symptoms. These problems are entirely unrelated to your commercial sex contact all those years ago.
So my advice is to continue to work with your doctor, and perhaps also discuss whether you should be referred to a gastroenterologist for further evaluation. But based on the information provided, I'm sure it isn't anal cancer, HPV, or any other STD.
Best wishes-- HHH, MD
Your general health and tobacco and alcohol use are irrelevant. Plenty of healthy nonsmokers and nondrinkers have the conditions I mentioned and/or symptoms like yours.
Thanks for the thanks about the forum. I'm glad to have helped.
Many thanks doctor, that is reassuring.
Because I don't smoke, drink alcohol or eat red meat, so should be fairly healthy, I am baffled as to why I would have such problems, so I guess I'm trying to think of *anything* unusual that might be the reason :(
The internet seems to be full of vague suggestions and 'could bes' so it's good to read a second opinion from an actually medically qualified person, thanks again. I think I will ask again to see a gastroenterologist.
I agree with your doctor. This information doesn't change anything in my comments above.
Can I just add that my lymphnodes *are* swollen, and they feel quite hard to me, but my doctor said that if it were cancer-related, the swelling would be painless, which it is not, it is extremely tender, even when not touched. He says it is more likely an infection, but for nearly three months?!!