Your question has been fully answered that you should trust your test result and move on with your life. As you are having a hard time with this due to anxiety, it would be wise to follow up with your doctor for that referral to a doctor that can help you with your fear and anxiety. We wish you the best and are closing this discussion.
You have more than conclusively tested negative at this point. I agree with your doc that this is not an HIV issue, it's a mental health issue that requires counseling if you're unable to move on with your life.
It is abnormal to repeat tests, especially as long as you have.
I agree with your doc - a psych doctor might help you deal with your HIV phobia and accept that the 40 year old science is solid by helping you understand that because you have zero medical training you have no credible basis to question the test results.
Good luck, as there is no reason to live your life this way where you are inventing your own frightening science world, if help can make your life normal again.