First eggs are often like that Jinty. It could be a wind egg with no yolk, or just a little tiny egg. You may also get a few thin or no shelled eggs too. But once they et the hang of it, you won't go back to buying shop eggs! You'll probably go without until you get your own eggs again! lol
I've even got a lady in our village who's daughters won't eat an egg unless its one of mine! They are going away tomorrow, and the only way her girls will eat an egg is for her to take some of ours with her!!