Ok ladies, today is CD8. I took an OPK on a whim after my workout. I had about a 2 hour hold since my last bathroom visit, but I also drank about 20oz of water during my work out. It's clearly a negative OPK, but it's using very diluted urine. I'm just surprised at how dark it is based on the "sample" I used and the fact that it is SO early in my cycle (O is usually around CD16).
I'm going to test again this afternoon, after a legitimate hold, but I think it looks like I'm definitely gearing up to O (hopefully soon).
PS: It looks darker in person. lol