I have a Red Sex link that lays an egg very similar to yours (pics attached), she always has-I don't think I ever thought it was too off from the norm just how she lays them, she lays everyday since she was 20 wks-maybe missed a few days at the beginning but not many. I'm not sure the egg shape is your issues with her not laying. I do have a Silver laced Wynadotte that also began laying at 20 wk, and we had eggs from her for about 2 months she was not regular and layed were ever the heck she was in the coop-found them everywhere. Well, she just stopped laying one day too, for almost 3 months and then all the sudden she started up again and her eggs were bigger than ever and now lays in the nesting bins with the other girls and very regular about it; 4-5 eggs a week. Sue Ellen, our SLW, is a grumpy girl and does not like change, I think when we added the second flock to the original 3 she went on strike. Chickens really do not like change much. I have always read that about them and I believe it..has anything changed in your chickens routine?