You don't need to take a DUO test past 28 days, a simple antibody test would be the correct test . 3 months post exposure is when you can obtain your conclusive test result.
Unprotected penetrative sex is a high risk activity. You 29 day rapid test would not indicate anything. You can take a duo test now as it is pretty accurate after 28 days or take an antibody test at 6 weeks followed by 12-13 weeks for a conclusive result. Goodluck.