reflux/LPR after coming off Prilosec

First time posting, but have been reading/lurking quite a bit for the past few weeks. Last month I went to the doctor because I'd been having abdominal bloating/tenderness/loss of appetite; she believed I had a case of mild gastritis (due to an uncharacteristically greasy meal I had eaten several days before -- I normally eat fairly healthy, and don't smoke or drink) and prescribed a two week course of Prilosec. The prilosec helped a little, but did not completely alleviate the symptoms. The two week course ended and just two days later I started getting symptoms of acid reflux and LPR (have never had these problems before). I told my doctor who just prescribed another, stronger course of PPIs, but I'm afraid to start them after reading about the acid rebounds some people experience. It's been over a week and the LPR symptoms (sore throat, mucus/post nasal drip feeling, pressure in esophagus) are constant. I tried Zantac briefly, but it didn't seem to touch it. Baking soda seemed to help once, but subsequent times only temporarily alleviate the burning in my throat. I've tried adjusting my diet (just fruit smoothies), probiotics, DGL, apple cider vinegar but nothing seems to make any real difference.

Could this be acid rebound (even after such a short time on PPIs)? Has anyone had similar experiences? How long did it last?

(I have an appointment with a GI at the end of the month, but I'm worried they'll just push another prescription at me)

After two and a half weeks I'm still getting the reflux. It seems like it might be a little better, but maybe I'm just getting used to it, I can't tell. Finally had my GI appointment today and the doctor was pretty dismissive. Said I hadn't been on Prilosec long enough (only 2 weeks) and that it was probably an ulcer (but everything I read says that ulcers don't cause reflux). Really frustrating. But they won't do endoscopies until you've tried PPIs for 4-6 weeks, so she's put me back on at the stronger dose (40mg). Really not thrilled about this. But I'm also scared of the damage the constant reflux is doing to my throat/larynx/lungs. I don't want to go back on PPIs, but I'm thinking of giving it at least a few days to see if I notice any difference with them (I know it takes about 3 days for them to reach full effect). The more things I try, the more information I have, I guess? If I don't notice any difference after a few days, however, I am seriously considering calling BS and trying the natural route again. I don't think diet is the culprit since the reflux really kicked off when I was only eating fruit smoothies, but who knows. I also haven't been brave enough to try HCL supplements, so I may try that as well if the PPIs fall through.