Stress is a factor that triggers attacks of all kinds on our weaker organs. Lately, I had some kind of acid reflux, which I don"t remember having since I was pregnant years ago...but I have been so stressed lately that it is not a surprise.
You say that orange juice is deadly for you, is it because of the acid? If you have kidney problems per example, you would have to not overdose on any vitamin C.
Also, all is in the oil used in your food. Make sure that you always use unsaturated fat and olive oil is the best oil to cook or put in your favorite foods. The mix with balsamic vinegar is a great one to dip bread. Another one that I like is the sunflower oil for frying.