Thanks Aitch, good point about the irritating hand on tummy, although I had it there more for comfort and was bouncing with my other hand, but will try with hand on shoulder or without a hand on her as you do have to be a bit of a contortionist to do both.
Yes we have been swaddling and using Infacol thanks.
I think she maybe just needs a bit of time to get used to the hammock and I just need to be a bit more patient and introduce it very slowly when she's more happy to be in it. She has only been doing the grizzly sort of "I'm overtired but don't know how to get to sleep" crying not the full blown "something's wrong" scream.
Thanks MyEye about the 1.5-2 hour rule - will try that as she is definately overtired a lot of the time.
Also like the idea of the compromise half night in hammock, half co-sleeping (thanks NUT) or would that just confuse her? Then maybe she could spend more time there as she enjoys the hammock more .
Thanks also for the book suggestion VP, will try to get hold of it .
By the way Sopiebbb there is a study that has shown that using a dummy at night can help to prevent SID so well done for instinctively knowing that!
I would really like to persist with the hammock as, as well as selfishly wanting a bit more sleep for myself, I don't think my dd gets very good quality sleep in the day when in a sling on me. She is sleeping beautifully in the hammock now after an hour of bouncing and very little crying. Hopefully she's starting to like it