Thanks for your help guys. I use OPK's every month, and only ever get a very prominant line when I am about to ovulate. That is why I thought maybe there could be a chance I could be pregnant as there were definite lines present today when I tested and I have read somewhere on this forum that some women have used OPK's in the past.

I have also been monitoring my BBT's and they suggest that I had an implantation dip the day before I started to have what I think is implantation bleeding. I guess I will just try again in the next day or two - if I can wait so long....... Seems like an eternity doesn't it??