My 4.5 month old has been fighting her 4th nap the past couple days. Her usual awake time is 1 hr 45 min, and it usually takes no time at all to get her down. With the 4th nap, it had been taking upwards of 30 minutes and then of course I wake her so her bedtime isn't super late. Is this a sign that she's ready to ditch it? Also, if we did that we would obviously have to bring up bedtime. She usually goes down around 9ish. If we dropped the last nap bedtime would be moved to like 7-730.....that seems like a dramatic shift to me.