The "lump" in your throat may be indigestion. Even when you don't eat, your stomach still produces acid. Make sure you are taking your Prilosec. I find food actually makes mine better. Good to hear that green tea helps you. Continue with that. Are you getting enough Protein in? The NUT is a friend. They are another tool to help us lose weight in a healthy way. Do not be afraid of the NUT. They are there to guide you and to help you stay healthy. Keep a calendar / journal of your problems. List dates, times, amount of food, how you felt, amount of drink, how you felt. This is very important information for the NUT. I hope your visit with the NUT goes well!!
Keep an eye on your blood pressure. If you are on medicine, you may need less. Definitely communicate with your primary care physician if this continues.