I have pain in stomach that feels like I have to belch to relieve pressure, but when I belch, the gas comes back dramatically. I'm also having bloating and periodic pain. This has been going on for about 10 days. Any idea what it could be?
Because this is a new symptom and it's not getting better you should consider seeing a doctor about it. You should also think about if you have had any changes in your diet or lifestyle that may be contributing to this.
Your symptoms could be due to a variety of things such as gall bladder, reflux, gastritis, parasitic infection, food allergy/sensitivity, irritable bowel, etc. It's impossible to know what the cause is without a thorough evaluation.
Here are some links that might be useful to you:
Heartburn Trigger Foods
7 Symptoms of Acid Reflux
Understanding Acid Reflux: A Doctor Q&A