Missi I am sorry you lost the chick. Sometimes there is just nothing we can do to help the weakest ones. You did it all correctly by giving her all the right stuff in order to help her out. She was just to weak to survive. Its nice your husband buried her for you since you were so attached to her.
I would put all your eggs in at one time to the incubator, set the correct temp and humidity, turn eggs at least 3 times a day. Wait till lock down on day 18 then remove turner or stop turning them by hand. Raise the humidity and wait the extra few days till they pip and then hatch. Remember it may take longer then 21 days so don't freak out if no pips on 21 days. Candle when you can a few time and last candle is day 18.
Good luck
I would put all your eggs in at one time to the incubator, set the correct temp and humidity, turn eggs at least 3 times a day. Wait till lock down on day 18 then remove turner or stop turning them by hand. Raise the humidity and wait the extra few days till they pip and then hatch. Remember it may take longer then 21 days so don't freak out if no pips on 21 days. Candle when you can a few time and last candle is day 18.
Good luck