My dd is only 22 months but is currently refusing to nap. She's been awake since 6:45am, it's now almost 3pm now and she's been faffing around in her cot now for ages. I give up!
She went though all her nap transitions earlier than 'they' say: 3 to 2 at 5 months, 2 to 1 at 11 months, so I wouldn't be surprised if she is dropping her nap completely.
It's not like we could try quiet time - how do you tell a (not-yet) 2 year old to 'go play quietly in your room'?!
Sorry for the rant. I've been searching for similar cases on here but can only find ones about 2 1/2 yr old who no longer nap for 3 hours. Chance would be a fine thing!