Egg bound hen laid an egg with no shell.

Pricilla hadn’t laid an egg in 3 days which is odd. She usually lays every other day. I noticed a change in her personality today. She wasn’t excited for treats and I noticed her straining but nothing coming out. I decided to give her a warm bath and 20 min later a shell-less egg popped out!! They have constant access to oyster shell and I often feed them egg shells I throw out. Could this be because she’s a new layer or should I be concerned?