@mikejjb123 when I have had gastritis, my stomach hurt and felt cold inside. It a strange feeling indeed. Are you taking medication for the gastritis? It’s an inflammation of the stomach lining that causes all that but I can’t remember if the doctor gave me an antibiotic or something else for it…

My husband had a bout of feeling so cold he couldn't even warm up in the bathtub. His temperature was normal, but he said he just felt awful, and cold despite being under an electric blanket later. We took him to a walk-in where his blood work showed his white count was very high. He was hospitalized for sepsis, but they couldn't locate the area of infection. He was given antibiotics, and watched closely in the ER. Later an endoscopy identified an infected area they felt had precipitated the sepsis. I'm glad we took him to see a doctor.

Feeling cold is also a symptom of low thyroid hormones. I know my dose is off when I get cold and fatigued.

Hi, are you taking a Vit D supplement?

What is your weight and body fat, the lower my weight from cancer the more easily I get cold. My body fat is non existent which is an issue for insulation. I'm 130 plus of just hydrated muscle. You need a proper combo

When this happened to me I sat with a heating pad against my stomach.

@mikejjb123
Sorry to hear that you are dealing with gastritis and GERD. I have had episodes of that a few times- makes me feel miserable in general.
Low thyroid hormones was mentioned already - good idea to have that checked.
I have experienced circulation problems, also feeling cold- especially cold feet. After I got a new aortic valve I’m warmer in general.
What stands out in your case is night sweats- I hope you have a good primary care doctor who can go over all possible causes.
You shouldn’t have to feel so cold all the time.

I find I am wearing a sweater no matter how hot it is. But, at least it isn't painful. Some consequences of eating the wrong item are painful.