This is not a risk for HIV. The only risks for HIV include having unprotected vaginal or anal sex or sharing IV drugs that you inject with. Air and saliva inactivate the virus. You have to have penetration for risk. It sounds like your fear/worry are causing you to doubt but you'd likely know if you really penetrated. NOTHING to do with oral is a risk. Again, saliva and air inactivate the virus. All HIV tests are conclusive after 3 months and a combo, 4th generation test is conclusive 28 days and beyond. so yes, your test is conclusive. No, you never had a risk. The lab is not going to make a mistake and that is anxious thinking. You were not infected by the blood draw to test.
With all of this said, you should not be worrying about HIV. However, what is probably going on is that you have some health anxiety. If you still feel worried after this and this is a moderated forum so information is accurate, then I'd consider if you have an ongoing condition of anxiety. Anxiety is also a disorder and it can be treated.