My daughter just turned 3 months and today all of a sudden she started to take 6oz then go right back to sleep for 2 hour naps. When I wake her up she's up for about 30 min, drinks another 6 oz then is out again for 2 hours. She's usually on the dot with her growth spurts but she's sleeping a lot and just getting up to eat it seems like. Should I be worried or is this just another symptom of a growth spurt I'm not use to?