(((Hugs))), Claire. I think it's worth getting a second opinion too. You know her best, hon, and if you're questioning it, then trust yourself. I tried to do away with that early morning feed when G was 12mo and cutting his molars. It took me 3 days of 1-2hr settling before I realized it was no use. The molars weren't causing him to wake, but I do think they were causing enough discomfort for him not to be able to settle. I knew if I was questioning it, I couldn't carry through. And, I'm guessing reflux causes more pain than teeth.
FWIW, I think it's totally fine for your DH to sit with her rather than do WIWO.
And, I absolutely love the avatar as well!