Good luck for your POAS tomorrow ceds!
Teenie I have had similar fluctuating OPKs before. I think it's quite common to get a little surge a few days before the actual one e.g. this month I had a test line present on CD8 (first day of testing) which then went away and there is now just a really faint line coming back on CD11. Last month +ve was CD12/13 so expecting it will get much darker by tomorrow.
Lucie glad you'll be able to get a repeat SA for your DH though it's not good that the private clinic won't admit to their mistake. I would have thought they really should offer to repeat it free of charge if it wasn't examined within the right time frame.
Foxtrot - love it! Not only am I going to be prodding boobs, scrutinising CM and obsessing over any tiny twinges, aches and pains - I'm also going to be subtly trying to entice the cats onto my lap just to convince myself that I'm pg!