I definitely think you should test agin in a couple of days, but I just wanted to let you know that when I fell pg I didn't get any implantation bleeding, but I did get a faintish line on an OPK about 10 DPO, which really tipped me off to the fact that I might be pg! I tested with HPTs from 11DPO but didn't get a + until 14 DPO, and it wasn't a really dark + until 15 DPO! It's all sounding very good for you, fingers crossed. Good luck, and let us know how you go!