DD is 17 months old and transitioned over to 1 nap a day at 15 months. She's never been a great napper and is a pretty sensitive sleeper overall. When we first made the transition, she would sleep anywhere from 2-3 hours, which was great.

Lately, she has been waking up 25-30 minutes into her nap. Sometimes, she will cry for about 5 minutes and then go back to sleep, but other times she will stay awake, so I'll just end up getting her. I can tell she's still tired, so I'll try and put her down for a second nap in the afternoon (which works about half the time)

This has been happening everyday for the past 3 weeks. Right at the 30 minute mark, she will wake up crying. I'm not sure what's causing it, but it's becoming difficult to handle because the lack of sleep causes her to be cranky the rest of the day. I've tried putting her down for her nap at different times, but nothing seems to change her waking up after 30 minutes.

Has this or anything similar happened to anyone on here? Any suggestions would be great. Thanks!