Don't know if my duck egg is alive. HELP!

[angie369]

Ok, so I've been incubating a duck egg for 22 days now and I'm new at this, It feels heavier and looks fuller than before. For some reason it has this new blue spot on the opposite side of the air sack. Also, it's kind of getting a weird blueish color around that blue spot. I'm worried it died. Here are some pictures for help.

 

[RubyNala97]

What breed duck egg? Have you tried candling into the air cell with a small LED flashlight? You should be able to see the duckling and see if it's moving. Something like this: (make sure the batteries are new)