Welcome to HCM.
cannot survive outside the body or body fluids. Sweat and even urine of the infected person is not infective.
Bathing in swimming pool or a pond is not infective. So, bathing plug is also not at all infective. So not to worry and confuse yourself.
Tests for HIV are two types.
1.Antigen test - They become positive 3-4 weeks after the possible risky exposure.
2.Antibody test - They become positive 8-12 weeks after the contact.
There is nothing to worry for you and be happy.