At least now that you're this far through there's definately an end date in sight and it won't go past that - 1 week to go (hopefully)
I hope she at least goes another 10 weeks

Is it a bit like heartburnish? Like reflux maybe? I'd definately ask you DR about it but it's probably like you said, bubs pushing everything up wards (and out haha)
Hope it settles soon!