If you Google GERD and dizziness you'll find lots of other forums and boards where people are making the connection. It sure sounds like it's possible. Nausea is a definite GERD side effect that I've heard of many times. Sorry to hear you're struggling! Hope you feel better soon.
Nissen Fundoplication 2/09
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”