When you use a home HIV test, you collect a blood sample at home, usually by sticking your finger with a lancet and blotting the blood onto a piece of filter paper, which you send to a lab for standard HIV antibody testing.

An "inconclusive" result might mean "insufficient" or "indeterminate."

"Insufficient" simply means that there was a problem with the sample you provided that prevented it from being tested at all. "Indeterminate" means that the test was run but didn't clearly provide a negative or positive result. People with indeterminate HIV test results can be HIV infected and in the process of seroconverting, a time during which an HIV test would show a result of somewhere between negative and positive.

For many reasons (other viral infections, or just nonspecific antibodies in your blood), people can also be HIV uninfected and have an indeterminate test. The best course of action would be to repeat the test, but here things get a bit tricky: If the new test is negative, which one do you trust? Ideally, the old blood sample would be retested at the same time as the new one is tested, to see whether the problem was with the testing method when the first test was run. This isn't always possible. Pursuing retesting through home-collection test kits can also get very expensive very quickly.

An alternative would be to get retested for free at a local voluntary testing and counseling site (run by various organizations and searchable on the internet). Explain your previous indeterminate result to them; they should have a protocol for addressing this situation, whether it involves combining a repeat antibody test with an RNA test, or performing a series of antibody tests.