DD is almost 3 weeks old and for the last couple of evenings/nights she has been feeding somewhat differently, between about 9pm-2am she has been constantly wanting to be at the breast and is being very wriggly, fussy, making odd straining/grunting noises and coming off all the time when i give it to her but crying when she's not on it, whereas during the day (and previously all through the day and night) she would always do a nice cycle of wake up, feed on one breast, change, feed on the other breast, sleep.
She also looks very unsettled and frustrated during this time and goes to latch frantically like she must be starving when in fact she has drained both breasts! I was worrying that i wasn't producing enough milk for her but even after several feeds it was still coming out so hoping that's not the issue.
Last night we resorted to rocking her for an hour or so to some nice music, she looked knackered and looked like she wanted to go to sleep but was fighting it. She did calm down somewhat but every time she stirred and woke up she would instantly root and cry but when i tried to feed her she would start doing all of the above all over again. She did eventually go to sleep rather suddenly as i was about to try and feed her again and she settled for a good 3 and a half hours or so. Then by about 6am she was back to the nice usual cycle.
Is this normal behaviour, is this just the cluster feeding i've read about or is it something else? could she just be over tired, over stimulated or having some kind of growth spurt? could there be something up with my BF-ing technique? Any advice is much appreciated :)