One thing I forgot to mention is, I always feel like after I eat I have to force myself to burp, or after I drink water I burp, I feel like I always have a lot of gas trapped inside my body despite me eating relatively normal, I don't drink soft drinks, just water, don't eat a lot of sugar or foods that would cause gas.
I'm glad you mentioned that you feel like you have gas trapped in your body, and your gassy feeling.
The chest pain that you mention - does it ever feel like a burn? Pressure like something is pressing down or sitting on you? Is it sharp, like something is stabbing you? Do you feel like it's hard to get a deep breath?
Has anyone mentioned acid reflux or GERD to you? Maybe a hiatal hernia?
https://www.webmd.com/heartburn-gerd/guide/what-is-acid-reflux-disease#1
None of these are serious, but they can be treated. If it sounds like what you have, you should talk to your doctor about it.
And don't discount anxiety. Even if you do have acid reflux or something, anxiety can actually heighten your symptoms, making things feel worse. Anxiety can give you real physical symptoms. It doesn't mean you are making them up.
Hello~I am sorry you are having these concerning issues.
I have a hiatal hernia and I don't ever get heartburn or other symptoms, but I do get pain at times, also, lots of build up of gas can cause chest pains and even pain in your back. Another thing, for me, my back being out of alignment causes pain as well, my chiropractor is able to help with that.
I would:
1) See your GP again and discuss the possibility of a hiatal hernia or issues that might be causing this discomfort.
2) Purchase a good, high potency pro-biotic, this often helps with the issues you are having as it puts back "friendly bacteria" in your stomach.
3)Purchase a bottle of "Aloe Vera Juice" at your health food store, this always helps with my hiatal hernia issues.
4) If all else fails, make an appointment with a chiropractor, your back may have some vertebrae that are dislocated or pushing on nerves causing the chest pain. He/she will take some x-rays of the spine, study the results, then go over them with you. After a few treatments, you should start feeling lots better.