I hope it will be okay, if the temperature isn't too awfully high right now they may not have even started to develop, and fertile eggs can sit a while before you incubate them. I would say get a bigger cooler, work on it and get it set up right then switch those eggs over. Then candle at 7-10 days and see if you have any developing. If not, find some more fertile eggs and try fresh with a new batch. I do wish you good luck, I kept secret eggs in an incubator I bought at a yard sale for $5 when I was 16, only one hatched but my Mother was tolerant of me keeping it in my room as a pet until it started crowing, the little sneak! I gave it to a friend that kept chickens, and it lived a good long roostery life and made plenty of babies for me to go visit and coo over. His name was Poule and he lived in a hamster cage until he outgrew it, then he lived in a guinea pig cage.