The only risks for HIV in adults are:
1) Having unprotected anal or vaginal sex, or
2) sharing intravenous needles.
You can forget about any event that involves food, or the barber shop. Injections are usually given in the muscle, not in the vein, and are not a risk for HIV. NOBODY - and I mean NOBODY - re-uses needles in a hospital or clinic setting.
NOTHING you mentioned would put you at risk for HIV.
Having said all of this, it is clear that the problem is not HIV - it is anxiety. To deal with your anxiety, you will need to seek out professional counseling. Neither this, nor any online forum can adequately address and treat the anxiety problem you are facing.
please someone answer on this