Baby who never sleeps...

Okay not literally but she will only sleep 30-40 min during her 4 naps throughout the day. At night she will sleep from 10-11 eat, then sleep till around 2, then from 2-4 and usually she will wake at 5,6,7 and sleep from 7-9. She will be 5 months in 6 days. Has anyone else experienced this and if so is there anything I can do to help my little one get better sleep?