Welcome to Healing Well! I think you'll find many here who had what seemed like sudden onset GERD. The symptoms you're describing are pretty typical. It takes time for things to improve with medication. As long as you are helped by Pepsid, by all means go for it. It is true that H2 Blockers are not as effective for reducing symptoms as PPIs, and I'm sure that is the thinking of your doctor.
Keep up with the careful diet. Try elevating the head of your bed by putting blocks or bed-raisers under the legs. Sometimes sleeping propped up with pillows can bend you in the middle and create more pressure on the stomach and therefore, more reflux.
I'm sure other members will be by to share their experiences and suggestions.
Glad you joined the forum! It's a great place, and you'll receive lots of support and information.
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.”