ongoing abdominal pain, chest pain and back pain

Hello there,

I am 40 year male and have multiple health issues happening to me now, but in the beginning of my discussion I will mainly focus on explainning abdominal pain and chest pain then I will mention about back and joints pain.

Around late July, middle of night, I had discomfort around where gallbladder is located.

The following week, the discomfort turned into minor but clearly noticeable pain and I thought my liver was failing. I also had multiple nauseas at that time.

A week later, around 2 am, I had chest pain radiating from center of my chest, so I rushed to E.R.
The E.R doctor told me my chest was fine after checking EKG and other things.
He also told me my liver was fine after running blood test.
He advise me to see my primary physician for getting ultra sound imaging for my gallbladder although the blood test did not show inflamed gallbladder issue.

Few days after that, I went to see my physician, but he refused to get me ultra sound imaging for gallbladder because I had it last year and the test came out normal for both of my gallbladder and liver. I also finished Hep B vaccine January this year.

He then had me do stool sample because I had H.pylori last year and treated for it but they never checked to see if I was clear of H.pylori after the treatment.
The stool sample test returned and I was told that I was clear of H.pylori.

Afterward, the physician had me to get multiple blood test but everything came out normal. He then referred me to gastroenterologist.
After listening to me about pains and symptoms I was dealing with, the gastroenterologist diagnosed me with neuromuscular issue and told me all my digestive organs were fine.
But he agreed to get me endoscopy and it turned out to be I have chronic gastritis.

I began taking Omeprazole (a type of proton pump inhibitor) and I had been on it for 3 months.

My chest pain is still there. The pain mostly occur around center but it moves to side to side or below or up.
The pain feels like burning sensation mostly. Sometimes it feels like I have sore muscle or bruise on chest.

I also have pain around right side abdominal area. Usually it feels like something is squeezing my gallbladder.
I sometimes have very light electrical shooting pain or needle poking sensation.
The abdominal pain mostly stays around gallbladder but it would move to appendix area time to time.

What is interesting about my abdominal pain is that whenever I drive car, I could feel the pain is clearly noticeable in comparison to other occasion like walking or sitting.

While taking the Omeprazole, for a short period, I had had headache, mind fog and sometimes fatigues. However, I no longer have those possible side effects. (according my research about proton pump inhibitor, the side effects extremely rare)

Both abdominal and chest pain are less noticeable when I am walking or exercising or even focused on something seriously like studying.

Everyday is different but typically, I feel much better in the morning, then it starts getting worse.

My only clues about my symptoms are my diets, eating habit, and stress level.

About 3 month prior to the symptoms occurred, I would daily eat heavy meal late night (10 pm) then go to bed right away.
I used to be under extreme stress from work and school between April and May.
In June, for the whole month, I used not eat anything until 1 pm and I often felt pain in my stomach.
I used also drink several cans of coke in empty stomach

I quit drinking alcohol 7 years ago and do not smoke

Up until here, it was about my chest and abdominal pain.

About my back pain, it constantly move arounds but pain near right shoulder blade side is always there.
I do not remember if the right shoulder blade pain began after I went to the E.R or before because I have had my back pain for over 4 years.
So, it is possible I already had the shoulder blade pain before.

I have learned that troubles in gallbladder could cause pain in right shoulder blade and also chest pain.
I know I have chronic gastritis but I am wondering if I also have issue in the gallbladder.
Could they all (gastritis, gallbladder and back pain) be related?

Anyone has idea what I should do next? I am planning to get ultra sound imaging in January to check my gallbladder.