Well, stay true to her bitchy nature, it looks as though the witch has now arrived. 3 hours after I wasted a HPT! 
I shall learn from this cycle that not only can you have no symptoms and be PG... You can also have all the symptoms and not be!!
Also, judging by my chart I OVd on CD19 and AF arrived on CD29. This means my LP (for this month at least) was only 10 days long. Defo going to keep temping and see whether this is an odd cycle or whether my LP is just a bit short normally. Also, my BBT didn't drop today, it's still really high - it seems to be following Dizzy's example... so I shall see what happens to it over the next few days... It's a bugger not to have that warning drop off...
Oddly enough, I'm not feeling as demoralised as I have other months when AF shows up though... weird! I may now disappear for a couple of days while the witch stabs me in the abdomen though.
Thanks you all SO MUCH for your support this cycle ladies, I couldn't have got through the last couple of days without you. 
My new stats: BananaRaces, age 31, TTC #1, Cycle 6, BFP due 10th June.