@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.