Sorry zonat :( V disappointing to get a BFP and then a bleed. Hang in there and see what happens, hope ur able to stay feeling positive and, as you say, still could be a BFP in April.
Cookies and RightUp - I also poas yesterday evening and for me also a BFN 
No AF still today tho and I still feel completely wiped out (I'm typing this in bed while DH gives DS his lunch and all I did was take DS to the park this morning!!), but I'm also starting to cramp a little bit so I think AF will be along sooner rather than later, and I must just have a virus or something. Even if I did OV late this month, I still would be 10 or 11 DPO by now so I think if there was anything there I would have had a BFP yesterday. Ho hum.
But, of course, until AF comes along I can still keep fingers crossed!!
And good luck Georgie - I know what you mean, when I was preg with DS it was a surprise because of the PCOS and my irregular cycles so I only took a test because I just felt that I might be preg even tho I had no idea what that would feel like. But I just knew and I'm not really feeling like that this month either.
But, to any also disappointed ladies, a new year baby will be just as great as a Christmas one and it'll be a great way to see in 2013 