The chance that you are infected is quite low.
The rapid tests are very sensitive, and so a negative test at 12 weeks is close to 99% accurate. Very few people would become positive after that, related to an exposure 3 months before.
Of course, as you know, being retested would be the most definite answer- but I would guess your risk is extremely low.
Always ask if you need clarification/more information.
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By 9 weeks it is still over 95% sensitive.
We generally do a follow up test at 3 months- so if it was much less than that, a repeat is advised.
Still low risk, but the timing does make a difference.