I suggest that you take an antireflux , antinausea combination for a few days - a combination of esmoprazole/ pantoprazole
with domperidone would be good. You should also take an antacid gel two - three times daily.
Try to avoid fried, spicy, processed foods. Eat fruits, vegetables and plan your diet thoughfully. Take an antispasmodic at the time of pain.
Do not lie down immediately after you eat. Take a stroll, or a small walk maybe after every meal.