I forgot to answer about test reliability at 8 weeks. No problem -- your negative result is conclusive. See this thread:
http://www.medhelp.org/posts/show/1891685
Welcome back to the forum. Re "Please don't judge": we never do! This is a point of pride for all decent STD/HIV experts, whether in the clinic or on line.
It is probable that in the past 15 years, nobody in the world has caught HIV from having blood drawn, or a blood test performed. The testing equipment is designed so it is difficult to use on more than one patient; and even if that were easy, there is absolutely no reason that a nurse or other health professional would ever do that. What would be the reason? So you definitely do not have any cause for worry from either of these testing events.
A final comment -- which, I promise you, is not judgmental. This question, and your others on the this forum and the community forum, as well as your statements above, indicate that you are abnormally fearful of HIV and other blood borne infections. Abnormal fear of contagion can be an early sign of serious mental health disability. (For an excellent example in popular culture, see "The Aviator", the film biography of Howard Hughes.) If these thoughts (or other fears of being infected by germs through casual contact) are interfering with your life and happiness -- as I think they are -- please consider professional counseling about it. I suggest it out of compassion, not criticism.
Best wishes-- HHH, MD