C.C.
Yes, this is normal! Both of my daughters experienced a disruption in their nap schedules when they learned new skills - pulling up, walking, etc! Just stick to your normal naptime routine (as if you expect her to fall asleep) and she will return to her naps soon. Also realize that where it may have only taken her minutes to fall asleep before, now it may take her half an hour or more (and this may continue on until she's 2 or 3!). Be sure to give her the time to settle herself down and fall asleep prior to giving up on the nap and going to get her from her crib. Additionally, this age is when my kids began to give up their morning nap and started taking longer afternoon naps, so that may be happening as well. Lots of exciting changes! Good luck!