Agree with dropping the nap. Our DS1 & DD gave up their naps by 2.5 so having DS2 napping at 3 was new territory. He started (out of the blue) saying he hated his bed and crying at bedtime. And demanding me to stay with him, too. As soon as we stopped napping him all of that went away. I think he was trying to say, "I'm not tired" but didn't know how. All is great now!