If negative tests after a year haven't reassured you, then no amount of testing is EVER going to reassure you. The only issue here is that you're regretting what you consider bad choices. Rather than test again, which would be an utter waste of time, energy, and money, seek counseling.
If you have had a negative HIV test after 3 months, I would totally take that as fact.
If I am correct you had a negative after 1 year (without any new concerning incidents in that year) I would consider that good as gold.
You can search threads, but I can say if I am understanding this all correctly,
that the doctor on here, who has been seeing thousands upon thousands of people yearly for decades, has never seen a negative turn to positive after 3 months.
Now, take that, and the 300 top experts he was in a conference with, said the same thing.
That is after 3 months.
Now consider you tested a year after.
That should be the most assuring statistics you will ever find.
(hope I am correctly understanding you said 1 year after your fearful incident)