...oops 0 + 12, immediate implantation dip?

[applesoup]

We DTD last night (Mon) without any protection...totally...unintentional.

I'd been having a hard time this month pinpointing ovulation. My CM was so scant. Here's the timeline:
Saturday: (BBT lowest dip)
Sunday: possible O @ night (BBT rising)
Monday: possible O @ morning (BBT rising)
Monday: unprotected sex around 0+12 or 0+20
Tuesday: BBT dip down...

Is it plausible that there would be implantation dip so quick?

[Hobbermittens]

Are you wanting a girl? If so, you may have timed that really well for O+12. Good luck!

[rainbowflower]

definitely not possible to be an implantation dip that early - implantation doesn't happen until 5dpo at earliest, and even then that's uncommon. 7-8dpo is average

a lot of women believe that once you have had the first temp rise the egg is already dead. Personally I've seen a LOT of charts where this isn't the case, but there is a very low chance of pregnancy then, probably less than 10%

[carmella_marie]

not possible to have implantation dip that quickly--like PP post said, 7-8 days is average. You're supposed to wait for 3 high temps to DTD (if you're TTA) since there can be two eggs released in a 24 hour period so you could still be fertile after the first high temp.

[TTC5]

I agree with the others

[atomic sagebrush]

Temps can be funny things sometimes and there are lots of reasons why you might have a weird "outlier" - that's why it's the overall pattern of temps that matter and not the temp on any one day, because it's often only evident after the fact what happened and when O took place.

Can you post a chart??