It's so awful when they cry and nothing seems to work. Is it possible she has wind? My DS2 became very unsettled when he had wind and wouldn't sleep. I ended up giving him Infacol drops before each feed and it made a HUGE difference. You could even try an all natural product called Brauer Colic Relief, I had great success using that with DS1, you can buy it in most chemists.

If you're still struggling, I highly recommend taking her to a paediatric chiropractor. They can work miracles with unsettled babies. I've taken both my boys as babies and had dramatic results. My DS1 was a very unsettled baby and would only sleep during the day if I held him. I took him to a paediatric chiro when he was 10 weeks old and it turns out he had a dislocated right shoulder from birth. Once it was fixed he was a new baby.

One other thing I can suggest if you're desperate is a baby hammock. I used one with DS1 and he loved it and happily had all his day naps in it instead of my arms!

Best of luck, I hope you find something that works for you soon .