I've suffered with both before and I would often wake up and immediately start thinking about my stomach, which if it wasn't bad would then make it bad. What I have found helps with nausea is drinking lot of water throughout the day, keeps my stomach acid diluted. I also take ginger capsules when it's bad and it helps a lot. Also a heating pad on the stomach helps.
Be careful eating fatty or high fibre foods, usually these are in breakfast cereals which is why I used to feel worse in the morning. Avoid all bran, stick to simple carbs and also avoid raw fruit and veg as it's hard to digest.
For the anxiety I have learnt various relaxation techniques from deep breathing to autogenics. Now when I'm anxious I do these while relaxing my body physically, which helps the mind relax. Anxiety is something that takes a while to go away but it will do. Most important thing is to try and relax when it comes, even if it's just relaxing your body physically it helps.
GERD, Anxiety, Depression, Rolling Hiatus Hernia, Esophageal Hypersensitivity