Is this autoimmune gastritis?

Age: 30

Sex: M

Height: 171cm

Weight:136 lbs

Race: other

Duration of complaint: 7 months

Location (Geographic and on body): Stomach

Any existing relevant medical issues (if any): Hashimotos(not on meds), skin condition (likely dermatitis)

Current medications (if any): N/A

Include a photo if relevant (skin condition for example)

I did my endoscopy/colonscopy about a month ago. Only thing it said initially with the scope was I had a hiatal hernia and reflux.

However, my endoscopy biopsy that came in showed nonspecific mild glandular atrophy of oxyntic mucosa. I don't have h pylori or drink/smoke so I don't know what could be causing this. My GI and one of my rheumatologists mentioned that it's possible it could be caused by something like pernicious anemia or autoimmune gastritis but I just checked and my b12,RBC,hemoglobin all seem normal. I also tested negative for anti-intrinsic factor and had <1:20 for parietal cell antibody.

My RBC is 5.91 and hemoglobin is 159. Is it possible to still have pernicious anemia. I am very symptomatic with stomach irritation after meals and loose stool. I also go through these flare up periods of burning and gnawing pain in my sternum area before it randomly gets better for a few weeks. It's start off with a stuck feeling and then becomes burning feeling in the sternum area. I also have tinnitus and light constipation.

Below is my biopsy report. The biopsy report mentions that a few things cause this sort of finding for glandular atrophy. I don't smoke or drink or have dealt with h pylori....so im worried it's autoimmune gastritis. My main symptoms is that I get a gnawing pain in my stomach for a few days and it quiets down again. I also have constipation.

My grandpa died of stomach cancer in his 60s so this is a bit concerning. I also have hashimotos (not taking meds since my t3/t4 are normal , only tsh is high)

https://imgur.com/a/ObLgLOg

"antral and oxyntic mucosa with nonspecific mild glandular atrophy of the oxyntic mucosa; otherwise no significant histopathalogical abnormality"