Maybe she is ready to go to bed in the evenings rather than staying up and feeding? I seem to remember DD2 doing something similar at about 3 months - being unsettled but not really wanting feeding, which is when we started a bedtime routine.
Hmm, didn't think of that. She had a REALLY fussy 'session' about an hour ago, couldn't do anything for her, rocking her, dummy, trying to feed her. In the end, I walked her into the kitched and latched her on whilst standing up and rocking her at the same time. Almost immediately her eyes started rolling and she's been asleep since. Only prob is, it takes for the dryer to be left on to keep her asleep!!! Argh!!!!!!!!
Ds2, who is 4mo, is like this in the evenings at the moment and I remember ds1 being the same as a young baby. Actually ds1 always used to have his "unhappy hour" right at dinnertime..ds2 is more considerate and waits until a bit later.
For my ds, it seems to be just tiredness at the end of the day. I just hold him and breastfeed him, or rock him, to sleep.
Reading your earlier post it seems like white noise does help? You can download tracks from the internet and putt them on a CD. We had an hours worth of hairdryer noise and I used to lie in bed and feed ds with it on in the evenings. He grew out of it at about 6 months and now likes music!
I could have written this OP. DD2 (9. Weeks) does exact same. It can take up to 3 hours for her to eventually fall asleep during which she latches pulls unlatches or sucks a little. We stand and feed for two min then walk then lie down jig around all sorts but nothing. Recently noticed a bath calms her the most. So forced us into a bedtime routine which I wasn't keen on so soon but hey.