I didn't mean completely safe, but I meants as safe as you can be using that method.
Ovulation can be delayed for lots of reasons. Even with symptoms on day 15/16, with cycles that can last 35 days and be normal for you I would be very leary about intercourse on day 19. I would be avoidong it from day 11 until day 23 to be completely safe. I wish you luck with whatever happens, and you can always call your Dr. if AF hasn't come in a week or 2 and you are still testing negative.
I suppose just wait until AF comes.....Good luck next cycle.