That's sad. Probably happens a lot that the first time incubating is a learning experience of what not to to, as it was for me. Hope it goes well next time.
The veining that goes all the way around starting from the center may be a vein. I have made the mistake of removing eggs thinking it was a blood ring, and it was a vein. I killed some chick embryos in error. I would mark those eggs and candle longer, to check for development. Sometimes it's...
I had very good success using a still air Little Giant with an egg turner. I also invested in a digital thermometor/hygometer that I placed flat so the reading was at the middle of the eggs. It is very important that the room you have the incubator in is kept at a steady temperature, with no...