I am pretty sure this is a blood ring, but I can't see it all around the egg. Is there anyway it could be a vein? The eggs are 14 days along, so I think it would be a lot more full if it was developing.
Yes, from the picture it looks like a blood ring, and also yes, at 14 days developing eggs will look pretty full.
Something that helped me was googling "day 14 candling" or whatever day you're on and looking at other people's videos on YouTube. It's nice to have the comparison.