I feel like I know the answer to this question but need support! I feel like I'm pretty firmly in the don't wake a sleeping baby camp, but my LO has now been asleep for almost 3.5 hrs for her first nap which is rarely longer than 2 hrs! She got her 4 mo shots yesterday, and I expected sleepiness yesterday (got them early AM), but she had normal naps and was her normal happy self. Is this just delayed vaccine tiredness? Would you wake your LO up? Our nanny will be here in a couple hours and I wanted LO up to hang out with her and then down for her next nap by then...