Terrible acid and belching soon after eating?

Lately I will feel real hungry so I eat, and unless I stuff myself ( meaning this only happens if I eat sensible decent portions) about an hour afterwards I will feel really bad pressure and burning in my esophagus and stomach. This will instinctively cause me to force out a burp just to relieve the pressure. The problem is thay I sometimes confuse this feeling with hunger, causing me to overeat. So this is really affecting my weight loss plans. I would like to kbow what thia could possibly be, what I can do to stop it and how can I diferentiate it from hunger to prevent my overeating since they sometimes feel like hunger pangs. Thanks!