Stomach pain, nausea, vomiting – alcoholic gastritis?

For context im not a drinker. Have had alcohol maybe 3 times prior to this week. I drank four or five days this week. I didn’t drink any on Monday but then yesterday I drank a half of a fifth of vodka. I think I have alcoholic gastritis. Is this possible for someone who doesn’t drink regularly? For some additional background info, I have had problems with cannabis, hyperemesis syndrome, and I think that my stomach was sensitive from my recent cannabis use. My real question now is if anybody can help me get over this. What can i do to stop throwing up nd being miserable?