It could be so many things hun xxx I had an expreience like that on my first, even a very faint BFP test... I did have the HCG shot (went through clinic) so I just wasn't sure. My FS said it could be an early loss, or my body reacting to the stress of TTC... or a while range of things in between.

I don't really know what else to say but only time will tell. Good luck and I'll be watching to see how it all goes xxx