three months old would be too young to lay eggs. can you post some pics of her? If she is older and needs to lay and you do not have the proper laying bin she won't lay. How deep is the laying area? is the sand moist or dry? The best is to post the pics. If she is the age you say then it is not the eggs and something else is going on which we can try and help you determine with your set up. pics of that would be helpful too.