Do I Need Fistulectomy If Having An Internal Opening In Rectal Area?

Hi I had got an internal rectal canal infection ( about 2.5 inches deep on right side) about 7 months back and this also caused internal spasm and pain. My WBC count was very high. I visited 4 well known surgeon , but non confirmed a fissure or hamerroids. they all said , it is just an infection.and With some antibiotics , It was taken care. It took some 25 days for me with different antibiodtics and at last got rid off with this infection and fever with tab. Augmentin.

Thereafter , I have been cleaning(washing) my rectal canal after passing stool with the help of a 40 ml lukewarm water using a syringe wash. This process has been done from last 7 months and I was feeling perfectly normal without any pain. But as soon as I try to stop this process for 2 days , I got infection/fever again I have to go back to anti-biotics (with doctors prescription only) .

docotor has advised there is some interenal opening in my rectal area and a complete fistualctomy surgery to be carried out by making secondary opening from outside and probe for primary opening. and it would be a big surgery

Is it possible to find the primary opening from inside and close it there itself after cleaning it or I need to get cut my rectal area completely

My bood repor (CBC) and stool / urine teast were OK , excpet my WBC count wich was high during last infection and current infection.

Though I am not experiencing any pain after my fever and infections have been cured with antibiotic course.

Should I for for futsulactomy ? or there is alternative treatment where primary opening can be blocked

I shall be grateful for your expert advises.