Is this a hangover or am I ill?

Sorry if this isn’t allowed here! I haven’t been drinking long (since beginning of October once or twice a week with my friends?). Went out Thursday night and had 6 drinks and was a little buzzed and happy. Friday night did the same, about 5 drinks. Then Saturday night the same! While I was out I felt fine, felt a little groggy Friday night. When I came home around 1am on Saturday I also felt pretty fine and sober. BUT i woke up on Sunday morning and I felt awful!! My head, ears, eyes, jaw, cheeks and legs were killing. I couldn’t eat or drink, couldn’t stay asleep, was getting major hot and cold flushes. This happened all day. I couldn’t go on my phone because it immediately put massive strain on my eyes. Today is Monday (I think..) and i’m doing much better but still feel awful frankly. Appetite still isn’t there fully. My stomach rumbles but eating makes me feel ill. I can drink, my legs don’t hurt and my head feels ‘funny’ but not sore. It just felt very extreme to be a hangover.. but I never usually get too drunk. I reach my limit around midnight and usually just get a little groggy the next day. Thanks!