Implantation bleeding?

So KB has noticed a little light pink streak yesterday and today. That, coupled with poking sensations off and on over the past five days and we are dying to test. But we are waiting until Thursday. And Friday is our blood test at the RE. I have a good feeling about this month and I think the wife does too but she doesn't want to say for sure because she is afraid of jinxing it. 36 hours folks.