Does anyone have any tips on how I can get my 3.5 month old to sleep longer than 30 mins for his nap? He is put down in his bassinet swaddled and with a dummy and puts himself to sleep. He always wakes after 30 mins, wide awake and with his dummy still in. I put him down around 1 hr 15m to 1 hr 30m after he's woken (any earlier he's not tired, any later and he's overtired and crying).
I lie down with him after lunch and he gets a solid 2.5-3 hours but if I try the bassinet at that time he'll still only do 30 mins.
Is this just something that he'll grow out of? My other children always did naps of a couple of hours and I'm not doing anything different with him.