Big hugs to you, I know its hard!!!! I remember DS went through a really unsettled phase when he was 6 weeks old - apparently a growth spurt time?? so they don't settle very easily!!!!! I think I used to just put him on his belly, and pat his back.. I used to sit on the couch with him on the seat beside me, and pat him whilst reading a magazine or something. I know I put him in his rocker chair thing and put him next to a window with a tree outside, and he would be mesmerized by the leaves moving and fall asleep with the movement of the chair. Or the dryer is another good one too, I used to put him in his little reclining chair in front of the dryer, and switch it on and the sound and movement used to put him to sleep.
Good luck!!!!! Its not easy being a mum!!!!