FF is only showing a dotted line, so not all of your signs confirm O. Has it been warmer than usual? Have you had a drink or 2 over the last couple of nights? It would be unusual for you to O this early as your cycle has been a regular 28-32 cycle for as long as I have known you on BB.
You did BD on the day of O, so if you have Oed there is a good chance you canught the egg. If your temp drops over the next day or so, then rises again around CD 16-18 I don't think you will have oed yet.
Though look for the silver lining, if you have O'd and missed the boat, so to speak, this will be a short cycle and will mean you can get down to the next cycle sooner. Assuming you don't end up PG first.
Also you should consider lunar fertility, which suggested the moon cycle can stimulate O, aswell as your normal cycle. You might O 2x this month? Keep BDing JIC.