Ok, I am training as a mind-body nutritionist and the biggest thing I have learnt in terms of how our mind and body works together is that stress is our metabolism's biggest enemy. There can be all sorts of sources of stress - emotional, environmental, stress due to money, a job we hate, relationship issues, unresolved emotional issues in our past, a fear of food and getting fat..... but the one that many, many people inadvertently cause themselves is through fast eating. Just the act of rushing through meals puts our body in a mild fight or flight, 'ready to run from a lion' response. In this state, digestion, assimilation and metabolism is not a priority for our body, having sharp wits and limbs ready to act fast is. If we regularly exist/eat in a low level stress response our digestive system and metabolism never works at its best and we end up overweight and/or with digestive problems.
If you were my client the very first 'homework' task I would be giving you, before adjusting anything about your diet at all, would be to practice slowing down with meals. Try and have no distractions (like work or tv), take ten deep breaths before you start to eat - saying 'grace' can help hugely with his, even if you aren't at all religious - and then try and spend as long as you can over the meal. I don't mean chewing loads of times but just really relaxing and tasting. It's a skill not many people have and it can take a long time - weeks or months or more - to really master because by habit we tend to rush food, but you will be doing you body a huge favour. Among other benefits it really helps you get back in touch with your appetite, your mind really knows you are eating and you will feel more nourished and satisfied (as opposed to barely noticing something you've thrown down in about 3 minutes flat) and you give you tummy the chance to send full signals when you've had enough, so you can stop before you overeat.
Try it for 2-3 weeks and see what difference it makes, if any, to appetite, bingeing and GERD?