Thank you for your post.
I believe that you can consider those negative test results conclusive. First of all, there is no significant risk of HIV infection through using contaminated equipment. This is extremely rare as the virus does not survive on equipment or needles. However there is a possible risk, Hepatitis C. People have become infected this way. My advice to you is to get tested for this.
Last question doctor as I forgot to put in my previous post.
Why does my doctor say that I have to wait 6 months for a conclusive result.?
At how many weeks would you consider it conclusive?
Thank you and god bless.