I tested negative 3 mo. After first exposure with same guy (6 wks after last exposure) via oraquick oral swab. What is the accuracy of neg. Result?

Good but not perfect. That result is reassuring but not perfect. Of all HIV tests, the oral fluids test is the one that takes longest, up to 3 months. Your risk of HIV was very low, unless your partner is an injection drug user, bisexual, or otherwise at especially high risk. (Just having lots of female partners doesn't count.) So if you retest, you can still expect a negative result. But I hope you're using condoms!