I was having the same problem, nothing worked. I bought a gripe belt and it worked a treat!
We find giving my little girl a bath and then a feed straight away after usually gets her out of the rut and kind of resets her so she falls asleep
Following as I am currently having the same issue with my 9 week old. He will just scream cry for ages from about 7pm. The only thing that works sometimes is putting rain sounds on loudly in a dark room and just bouncing/rocking him. Doesn't always work though!