My dd is 19 days old today. We've had a bit of a tough time with wind/colic after a traumatic birth. However, over the past few days (4/5) she has been much more settled and having more alert awake time during the day and sleeping more at night which is great. Last night it all seemed to fall apart, she was very tearful, crying lots and took ages to settle at bedtime, she woke a couple of times to feed and took a while to settle again. As th day has gone on she's become much more frequent with the feeds (hourly atm) but feeding for only about 10/15 mins then falling asleep. Is this a growth spurt, something else or should I be worried?