Ask a Doctor and Get an Answer to Your Medical Question ASAP
Hello from JustAnswer. This is Dr. Love.
Yes, this would be considered conclusive that you do not have HIV.
Your ex partner is correct about the absence of risk when the viral load is undetectable. There are several ongoing studies of couples in which one partner is infected and has an undetectable viral load and the couple has regular sexual intercourse and there has not yet been a single case of transmission of HIV to the uninfected partner.
And to whatever extent you might be concerned that the partner was not honest with you and there was some risk, a negative test done 6 months after the last sexual activity would be conclusive that you do not have HIV. And the finger prick blood test has excellent agreement with tests done on blood drawn from a vein, so is reliable.
If I can provide any clarification, please let me know.