Yep, I have her mattress raised with a rolled towel underneath, and try to keep her upright after a feed. DS was a horrendous refluxer so I think I know every trick in the book there!
When I tried W2S I was rousing her after about 35 minutes, but she would still do the jolting awake thing at 45 minutes. Perhaps I wasn't rousing her enough? I did manage to get her back to sleep at one of today's naps; I picked her up and cuddled her for a couple of minutes, then put her back in her crib and sat stroking her head for 10 minutes until she was still again, and she then slept for another 40mins, which was great. I'll continue with that, I think, as it seemed to work well.
The other thing I should add is that when she wakes she almost always grunts and strains and passes wind. I'm not sure though whether that's what's waking her, or whether it's simply that when she wakes and starts to move it pushes the wind out. I'm sure that one way or another, her waking is connected to her tummy troubles, so I shall keep everything firmly crossed that an increase in meds will improve her napping.
Thanks again for all your help,
L x