Sorry about your friend Farmer I've been there a few times, she has my full sympathy. Thanks for starting this thread. Are you still having af pain?
Hi everyone, I'm 5 dpo today. While it's too early for symptoms with my previous 3 pregnancies I had some kind of "alert", a change to my body scent (noticeable by my OH) with the first, implanation bleeding with the next, and a sharp implantation twinge with my third. Each time different, but each time well before 10 dpo so I'll be symptom spotting like mad. The earliest I can test will be Wednesday, af due anytime from Wednesday to Sunday.
Farmer re the opks, they pick up on a hormone surge that occurs before the release of the egg, but the egg might not release, so keeping testing thrughout the month can be a good idea. It can take up to 4 hours for the surge to be picked up by poas, and if the egg was released straight away then you have 24 hours approximately, because that's how long the egg survives. If you only poas in the morning then that might not leave you enough time to dtd. On the other hand, the egg might be released later... i.e. you just won't know. When I've got pg it's always been one off events on the day of the opk but that's my body, and as sperm can live for several days I don't know what that means in terms of when I actually ovulated.
Anyway, phew that was me being long winded, never a good way to introduce yourself!!!!! 
Good luck to us all!!!!!