Just that really! Every single nap, DD wakes after exactly 30 minutes! She naps in her cot in a dark room with white noise on and goes down for her naps quite easily most of the time.
I have tried leaving her to self settle but she just gets frustrated. If I go and pick her up, she will go straight back to sleep in my arms so I assume she is still tired but she will not go back to sleep in her cot. If I hold her she will sometimes sleep for another 1-2 hours but it obviously isn't practical for me to hold her all this time.
Any tips on how to help her to nap longer? She ends up so exhausted by the end of the day!