Your answer is yes to high blood pressure can cause premature ejaculation.
I understand your dilemma. Unfortunately, the incubation period, if ever it was exposed, would be 6 months from the time of intercourse. You can do 1 HIV rapid test now and repeat one more at 6 months. Please also wash cleanly your vagina area with soap, and if oral sex was performed, then rinse with mouth wash. The virus does not survive well in all these conditions. For now, would be to wait. However, you must have protected intercourse from now till you test yourself again at the 6th month.
Hope this helps. Please seek your local doctor's advice also.