Sudden “intolerance” to alcohol?

I recently moved to college, and since then I haven’t been able to have a drink without feeling nauseous or in pain. I have GERD, and I have some anxiety issues. I read that it could be a pancreas irritation or liver issues. I’m 19 f idk how common that would be. What’s weird is that I had two shots about an hour apart and felt fine, if not a little nauseous (I stopped as soon as I felt that). But before then when I had mixed drinks and stuff I felt horrible and made anxiety worse.