Bek, I probably would get a second opinion. Or go for the day-stay somewhere and see what they think. If she is getting so little sleep, (and you too are getting so little sleep) I think you should be helped out more than that (ie, "I won't do anything til she's 12 weeks old"... If she's got reflux, she's got reflux, y'know?) What about a paed?
Have you considered taking Loren to see a Chiro or Osteo that specialises in babies? I never got around to taking Natalie, but I have heard great things about them in helping unsettled babies.