Can anyone explain this?

I’m not asking for medical advice, just curious on if anyone has felt the same as me, and if they have an explanation on it.

So I can have like 10-15 beers through the day, carry a good buzz, maybe a bit drunk if I grouped them together to much. All on my two days off of course. Then go to sleep, have one in the morning while still feeling a little groggy. Then just immediately feel drunk. No buzz, nothing but drunk nasty feelings.

Before any judgement. I have less then 3 daily (yes still not good know) but on my days off I wanna let loose and day drink.