Bloating and indigestion, Sensation?

Hi Doctor, I have been suffering from bloating since 2015. Between 2017-18, l consulted with gastroenterologist, took endoscopy twice in different hospitals and result came that my stomach was healthy. But why do l get bloating issues? I am a reporter by profession and used to eat roadside spicy foods most of the time. I drink and smoke. Till now, there is no pain or burning sensation anywhere in my stomach. If l have stomach ulcer, does it exist without pain or burning sensation? Without treatment and medication l was fine for the past two years. But now bloating issue has again started. Digestion is irregular. Passing excessive gas. Feeling dizziness. I am not able to figure out what is happening in my body. Please help me.