It sounds a lot like implantation bleeding to me which is good news. I had it for a week before my BFP. Fingers crossed.
To comfort you I have had the entire spectrum of symptoms with all different results
once - felt absolutlely nothing - preganny and healthy pregnancy
once felt little - miscarriage
once felt nothing - no preg
once felt sure I was preggo - intense symptoms early on - miscarriage
twice - knew I was preggo - twins
I will keep my fingers crossed for us! I'm on day 11 now and had some light spotting again (red) this morning. It's making me very anxious.
My nurse said those symptoms are normal. I am on day 12 after a day 3 transfer of 2 embryos. My blood test is in 5 days also (4/29/09). I've been having light cramping but no spotting. The spotting can be a good thing for you because that could be a sign of implantation. Good luck to us!!!! Let me know you results since we test in 5 days.