Didn't knew of the curing process

[Oven cracker]

I build my own brick fire oven, I didn't knew about the drying process. The very next day I finished it I light it up, put in some papers and then some wood, and kept on adding wood. After some time it started to crack. have some big cracks on the out side, and some in the in side I even have a cupels of cracked bricks as well but not as big as the out side. What should I do?