Acid reflux help!

Alison • Pregnant with baby #1. Due mid-November. We conceived after our first attempt of donor insemination.
I figured I'd be one of those lucky people to get this lovely symptom early, as it was a pre-menstration symptom for me too. However, at 6 weeks it feels like it's killing me! No matter how I alter my diet, how small the meal or what I try it's still there! I have a constant sore throat, cough up really horrid mucus every morning and my voice sounds like a mans. I am sleeping sitting upright (not well, I might add) and still have moments when I wake up with what tastes like battery acid flooding my mouth! What else can I do ladies?! Help!!!