Morning all, this thread moves so quickly and surprises me every time!
On CD18 today - finally got a positive OPK yesterday evening, will do another today and see if it's darker again (I don't always catch the really dark line but get nearly as dark) or going lighter again! Got a whole row of them so I can see the progression 
From what I've read over the past few months, ovulation can happen 12 to 48 hours after the positive OPK.
Trying to keep 'on it' with DTD this month - managed CD10, 13, 15 and 17 so far.
Will try and go for tonight as well - who needs to sleep, eh!
I was looking at SMEP plan and it looks like it says to try every day for 3 days from a positive OPK, so given ydays was almost as dark I'm going to give that tactic a go this month, too.
Nothing conclusive yet from temperature - slight increase today but still at the 'lower' end of temps for me, so I don't think I ovulated quite yet.
We've got out works Xmas do on Thursday, which is always an alcohol fest - I'm going to try not to drink as I don't want to risk my fertility so close to ovulation.
How is everyone else feeling?