Your bub is right on track for a wonder week...6 weeks was bad for us and dd would only sleep in the sling. It is the peak of crying too, so things should slowly improve from here.
The witching hour is usually in the evening when the sun is setting and bub just fusses and wants to feed or be held and usually precedes their bedtime sleep. We still get it here...5 to 6 pm is hard work for all mums. As a newborn dd's worst time was 7 till 9 but it was summer time.

This too shall pass. Get out the wonder weeks book from the library or google it for more info.