My RIR is 19 weeks 4 days and yesterday morning she laid her first egg at about 745 today we went out and she was in the box for about 20 minutes and when she got out to our amaze...no egg..is she ok is this just a learning curve?? she sang the egg song?? she acted like she was going to lay?? is she ok.?? wE HAD A SHELL LESS EGG YESTERDAY BUT NOT FROM HER???