Chick or not?? Please help!

I had a broody silkie hen that collected eggs for a little less than a week, until she had 11. She then tried to sit on them, but found that she couldn't fit them all underneath her. After a day, she gave up. Before I could collect them, another hen decided that they were hers. She sat on them for a while, and I went camping for a couple days. When I came back, she had left them, but had also added 2. I candled them all and found 2 infertile, 10 with blood rings, and one mystery. I can't tell if this one is a chick or not. There are a couple veins, but not as many as you would expect to see. There is a blob at the top, that looks like it could be a chick. It has on darker spot, that looks like a head. If it is a chick, I want to stick it in my incubator and hatch it from there. If not, then I guess I'll just throw it out. But if it is a chick, I'm not sure what day it's on and what to program the incubator (Brinsea Mini Advance) with. If you have any suggestions, please let me know! I really want to help this little guy if I can. Thank you!

anyone?

I would say that if the hen left the eggs for two days then it is probably not good. Can you get a picture? I would maybe try to incubator it and set it for it sounds like it might be about a week. If we had a picture it would be better.