5 month old - not connecting sleep cycles

Our 5 month old will have 3 naps throughout the day she'll sleep from 9-10:30, 12:30-2 and from 3:45-4:30/4:45. She'll sleep for 5-45 minutes before waking up for each nap(then we cosleep so she can get consistent time). At night we do wind down at 6:15/6:30 feed-bathe-stretch-story and shes easy to put down at 7pm. Then it begins she'll wake