Having gas problem: burps a lot.

Hi I am a female 25 years old I had a gas issue for 4 years I burp a lot especially at nights and gas from bottom will happen all the time in a day especially at nights If in case I skip the food for 1 time a day then it will be a large issue for me like having continuous burps and gas stuck between chest and somehow I felt like gaa stuck in my throat This stuck issue happened everyday night I am feeling like if in case  I don't have this issue in a day it will be the happiest day for me Constipation problem is there but I  eat fibers and drink water and walk I know that it happened because I skipped meals during my college days so I realised and changed my diet and habits still this problem is struggling me alot Some times I felt like I have reflections/movements in my stomach when this gas problem occurs I know that I have to visit the doctor and I did several times but they only give me tonics medicines Anyways I am going to visit again Here I am asking for your thoughts.