Do you have a sling or carrier - they're often the best way to settle little babies. It's totally normal to want to be held all the time.
As for feeding, it may be that her tummy is more comfortable with more frequent, smaller feeds than big ones all at once.
Fussiness for several hours in the afternoon/evening/night is very normal at this age too. Again, cuddles/sling etc can be the best way of dealing with it.