Thanks for your query.Based on the facts that you have posted it appears that you have Gonorrhea
in 1982 which you transmitted to your husband .He was treated successfully and since then getting repeated episodes of Epididymitis
to the extent of so that one of his testis has to be removed.
Do not get confused that this could be due to the gonorrhea that might have been no been treated properly at that of point of time.
Repeat his blood tests to rule out STD
There is no need for you to confess as this may put you in difficult and grave situation and may damage your relationship.
Concentrate on getting proper and good treatment to him.