There is no reason to test for a disease you are not exposed to. hiv is a fragile virus and you can only get it from unprotected anal, vaginal or sharing hollow needles that you use to inject with, so if you don't do you are safe because hiv won't pop put of the environment and infect you.
The result of over-testing is false positives, so avoid over-testing in future.
There's a far greater likelihood of getting a false positive than getting a false negative. Your subsequent tests are conclusive, and you do not have HIV. There is literally NO way you had 3 false negatives in a row using Oraquick, which is highly reliable.
It doesn't sound like you were exposed to HIV in the first place. If you have a regular partner and you have each had other partners, the best course of action is for you both to test for HIV and STDs to ensure mutual confidence.