Alrighty, I went and saw the doctor yesterday, and while he does NOT think it's my gallbladder, he admits he's been fooled before. He thinks it's gastric enteritis (making too much stomach acid, I guess, which may be what's making me queasy and may also explain this sore throat I've had for weeks now), and he told me to take two 1000mg Tums with each meal as well as one Prilosec tablet twice a day ("Ignore what it says on the package," he said, lol -- the package says to take it only ONCE a day).
He also took some blood just to make sure he can rule out gallbladder-related issues, among other things. He said the results should be back Friday so he told me to call him then and let him know if the Tums and Prilosec are working as well as get the results.
He said the Tums/Prilosec therapy may not cure me but he at least is hoping I'll be feeling better when I call tomorrow. So we'll see.