Post nasal drip and gas/stomach problems.

Does anyone have lots of digestive issues with a post nasal drip? I noticed in March, right after I started having seasonal allergy symptoms, I started having to belch a lot. Since April I've had other health problems and I wasn't sure if the stomach issues were part of that or because of a post nasal drip. I'm pretty sure my apartment, which I moved into last year, has a mold problem which might be why my PND has been worse this year than ever before.
I also feel nauseous a lot and food doesn't seem as appealing as it used to, but at the same time I'm having to eat more than ever. I have to eat around every two hours or I'll feel lightheaded and have a lot of gas. Could this be caused by an increase in stomach acid from a PND?

Also every now and then, not so much anymore, I get a waxy taste in my mouth. Anyone else have this?

Thanks. Actually I was prescribed an antacid back in June and it didn't help, actually might've made me feel more nauseous if anything.

Yeah, I had a gastro appointment scheduled but they had to reschedule it and said it would probably be after Christmas, so I decided to just start going to an internal medicine clinic. I haven't seen a gastroenterologist but the doctors I've seen have said they don't see a lot of symptoms of any specific GI issue. I have a lot of general symptoms that don't fit in with anything like IBS, Crohn's, ulcers, etc.
The last doctor I saw said I might be getting gas because of a slight case of lactose intolerance, or because I have started eating more vegetables and other foods with fiber. But I also talked to someone on another forum who has a post nasal drip from mold exposure (I had mold in my apartment) and has a lot of gas. Also, a doctor I saw a few months ago said swallowing mucus can really irritate your stomach.
I was taking an Allegra every day and I stopped, but I've started again and in the past few days I haven't had many problems with gas. But I'm not sure if it's because of that or because I haven't been eating as many vegetables.

I just saw your post and it sounds exactly like me! I don't notice any post nasal drip, but have the exact stomach issues only during the spring and fall. Sick of it ! Stomach acid and slight nausea that gets worse if I don't eat frequently so now I am gaining weight too. Tried sinus pressure medication, anti-acids with very slight improvement. Did you find an answer ?
Thank you !

if you go thru the motions of putting something in your mouth and/or swallowing, your stomach juices start flowing, getting ready for food. this is why you can't chew gum, etc before an endoscopy. so, yes swallowing mucus can irritate your stomach.