When i was born my stomach muscles had not developed fully. could this cause stomach bloating and constant acid reflux at age 28?

Acid reflux: It is not likely a congenital problem that is causing your symptoms. It is most probable that you have chronic acid reflux which is common. Treatment should include a consultation with gastrointestinal specialist, diet management (no alcohol, no cigarettes), lactose intolerance causes bloating. It is hard to find foods that avoid lactose. Best of health.