Welcome to HCM,
Chances of transmission of HIV
through cut wounds is 1-2%.
There are many adverse effects of these antiretroviral therapy.
If the barber is HIV positive then consult your doctor and start prophylactic medication.
If the HIV status of the barber is not known , then you can get his HIV testing done.
You can get PCR done for yourself, its very specific but costly. It has to be dome two weeks after the exposure.