How Can I Manage Severe Acidity, Gas, And Anxiety Despite A Controlled Diet And Daily Walks?

Hello I am suffering from severe acidity for the past eight months Pass too much gas After eating a meal in the afternoon the gas develops immediately and rush to toilet with a lot of gas Too much gad and thus had affected my mind very badly resulting in anxiety and depression I have controlled diet and walk 3 Km daily in the morning I am scared to venture out Please advice suitably