I Have Been Throwing Up. It Started Sun. Night Ar

I have been throwing up. It started Sun. night ar bed time. I drunk some cold water before bedtime almost imediatel started throwing up. Monday morning I ate a few saltine crackers aroung 8:30 am, they stayed down. I tried to drink a cold sprite and felt like I was going to throw up. At 10:30am I ate more saltine crackers.I drunk the room temp sprite at 12:00 with some saltine crackers with peanut butter on them. 2:30 i threw everything up. At 5:00 I ate a boiled white potato with butter salt and pepper. I was very hungry so I made popcorn in a boiler on the stove. 10:30 I threw it all up. I do have hypothyroid, NH Lymphoma, sand or ailments.