Frequent Burping & Bowel Irregularities.

I am a 31 year old male with digestive issues lasting 5-6 years. Over the past 1.5 years, I have been experiencing frequent burping throughout the day, especially after eating, drinking water, or even on an empty stomach. The burping happens during various activities like badminton, walking, running, & even at work. Despite consulting multiple doctors & undergoing tests like Abdomen Ultrasound, CT Scan, & Upper GI endoscopy, all reports came back normal. Medications like Pantocid IT, Rantac D, & Colonise Forte capsule haven't helped. Occasional heartburn adds to my discomfort. I also face difficulty clearing my bowels in the morning & need to visit the toilet two or three times. These issues have negatively impacted my daily life, concentration, & caused feelings of depression. Additionally, I used to smoke for ten years but quit six months ago. Consuming beer on weekends now leads to stomach upset the following day. I am deeply concerned & seeking advice and a solution for this.