Crappy Napper!

coco0723

My LO will be 7 months old on February 6th. Her naps have never been great, she stopped taking long naps at around 4 months and I was lucky to get a nap that lasted 30-40 minutes. Now she naps 20 - 30 minutes at the most and only about 3, maybe 4 times day. Has anyone else experienced this? Her nighttime sleep habits are so-so, very inconsistent. She goes down to sleep just fine and some nights will sleep a 9 hour stretch and other nights she is up every 2 hours. I'm totally puzzled. Any thoughts?