True, your BDing was perfect so I hope this is your month!
Healthy, I really think you Oed on CD16 (FF frequently assigns O too early) and BD 2 days before is ideal timing, with highest odds of conception with one attempt. Fx!
purple, huge congrats on your beautiful BFP!
Maudster, I would stick with BD every 3 days and not do it any more often, not even 2.5 days. You can have both positive and negative OPKs the same day depending on time of day and urine concentration as well as length of surge, all of which can vary greatly. If you get any positive it's positive for the day. I often only get one positive per cycle, usually in the afternoon the day before O. Good luck!