K.C.
My son, 2 yr 9 mo, just did the same thing. For us, he had no problems going down for a nap (5 min after I put him in bed), but come bed time (9pm), he couldn't wind down and it took until 11-12 most nights. We were busy for 4 days in a row and he refused to sleep unless we were home and he was asleep by 8 each night without a fight. We experimented and he has days where he is cranky and falls asleep even if we are out, but the naps are shorter than they used to be and he is still asleep by 9 at the latest. I asked for advice from a child development specialist and she said if there is a fight at either of the bedtimes (nap and night), then the child is probably ready to drop that nap. She also suggested putting them to be earlier for better night sleep and avoid that crankiness. Finally, she said a great majority of kids drop their naps right around 3. Hope it helps, we are not alone!!!