Are you sure no need to test? I have been experiencing some terrible watery diarrhea today, and I've read online that diarrhea is a symptom of hiv/compromised immune system.
Good news - you do not need a test at all.
As an adult, the only risks for HIV are:
1) having unprotected, penetrative vaginal or anal sex, or
2) sharing IV drug needles with other IV drug users.
These encounters were NO RISK events for HIV.
Although you do not need an HIV test, the most up-to-date information states that a 4th generation Ab/Ag test is 99.89% reliable at 28 days post-exposure.