Excessive Burps, Belching and Heartburn.

Hi I am 28 year old male. I have been experiencing some digestive problems from last 3 years. Though they have never been consistent but from past 6-7 months I have started burping alot (more than 100 times) through out the day especially after eating food, drinking water or even when I am empty stomach. I have consulted few doctors regarding the same but it hasn't helped. Sometimes there is heartburn situation as well. I took Pantocid IT, Rantac D, Colonise Forte capsule but it isn't helping. I am physically very active in my daily life. Sometimes it becomes very difficult to even lie down on bed as it feels I will puke if I do not burp. This condition has taken a toll on my daily life as it becomes very difficult to concentrate on my work. Also, I am not able to clear my bowels at once in morning. I go to the toilet twice or (thrice sometimes) in order to clear my bowels in the morning. please suggest a way out of this as I am very tensed. ps: I have a habit of smoking.