Actually you're not really far from the norm. Check out a condition called "LPRD", which is related to GERD. Basically the acid doesn't stop at your chest, it goes up to the back of your throat, dousing the vocal chords along the way. Pain in the ears doesn't seem to be common, but I've felt it as well, so I know what you're going through.
Thing with LPRD is that most people with it don't get "heartburn" they get "throat burn", which includes the vocal symptoms you're talking about. Acid doesn't stick around long enough in the esophagus to really do any damage you can feel, but the tissue at the upper part of the throat is considerably more sensitive. Chewing gum (particularly whitening gum, with bicarbonate) and sucking on hard candies (no mints!) should help keep some of that acid down. Drink water throughout the day, too. And, of course, follow GERD diet/lifestyle changes. And yes, weight loss is quite possibly THE best thing you could do for your symptoms. (FYI: I used to be 324lbs. I'm now 237. I speak from experience.)
As for the medicines, all PPIs take a few days to start working. Ask your doc to see if maybe an increased dosage (pill at morning, pill at night) for a short while (a few days) so that it kicks in faster, or see if you can take something in the meantime (Gaviscon, Maalox, etc).
Thanks so much for this info. I will definitely check out LPRD which I have never heard of and appreciate knowing about!