Sleep regression at 12 weeks?

Anyone else experiencing a sleep regression at 12 weeks? Our little one was taking 5 naps every day and would sleep for 45 minutes plus each nap. She would also have a solid 6 hour stretch at night. The last few days she has completely resisted naps, today only napping a total of 1 hour and now she is wide awake and completely cranky taking a few hours to go down for bed.