Addiction question

So I’m a 18M and I have now being drinking every day for over 2 weeks, note this is at least 7 pints of beer or more every day. I’ve now noticed I feel more anxious when sober and almost feel as if I’ve gotten more dumb, like doing basic maths feels really difficult and I struggle to process things more than I would usually. I was wondering if it’s even possible to get these side effects from only 2 weeks of drinking or it’s something else?