Any 5 month olds only napping twice a day?

My 5.5 month old has in the last week decided she doesn't want to nap at her regular times, which usually allow for three naps a day with 2-2.5hr awake times in between. She's instead been going 3-4 hours awake in the morning and then a 30-45 min nap, and then about another 3 hours awake before having a 1.5 hour nap (she wakes at 45 mins but I can usually settle her to sleep again).

Her night sleep isn't bad so I don't think she's overtired, but everything I've read says babies don't drop the third nap til 6-8 months, so I was just curious if anybody else's 5 month old is already only wanting two naps a day?