I have the same anything I even think of eating makes me gag.. Only thing o can eat is watermelon and apples
I had the same problem with heartburn and indigestion in the last pregnancy and I'm feeling the early symptoms this time round as well. Burping helps relieve the chest pain. I found Rennie or gaviscon worked wonders for me. If you can stomach the thought then try a glass of milk first thing before eating breakfast. Hope it eases soon for you.
I have no appetite but I just eat when I feel like it and I drink a lot of water and veggie juice. No heartburn but I am always burping and having feelings of indigestion. I'm sure it will pass. If you are underweight you definitely don't want to lose weight. Remember that your baby needs nutrition and it will take it from you if you don't eat enough! Stay healthy, eat more carbs and healthy snacks less empty calories like chips or soda. Good luck momma!