K.V.
My daughter is 5 weeks old as well and gets fussy at the exact same time and is an angel the rest of the time. She also bobs back and forth on the boob and does not want it. I have been changing up what I am eating during the day to see if it makes a difference since my daughter is also strickly a boob baby ;-) I have noticed that depending on what I have eaten makes a diference in how cranky she gets. I have cut out chocolate and some dairy products and soda (which was only maybe once a day) and she is only just a little fussy now and will go to sleep in her bassinet around 8 and stay there till her 1130 pm feeding, before I had to hold her as well and she would only take cat naps until I finally went to bed and had her co sleep until her 11pm feeding. So maybe look at what your eating and change it up a little and see if it makes a difference, or like the other moms say, its just the witching hour. My first daughter was horrible at that time but I never thought about what I was intaking that might effect her that much, this one I had gestational diabetes while pregnant and it made me much more aware of what I was eating which was what made me think to try and changre it uo and if it would effect #2 and her nightime fussiness. Hope this helps ((HUGS)) and cingrats on your little girl.