still hungover after 4 days?

hey guys, i (18f) recently just went to my first college party. it was a smaller gathering and everyone was safe (i knew them), i wasn’t drugged or laced with anything. it was my second time drinking, and i got really drunk really fast bc i didn’t know how concentrated the jungle juice was. it was also my first time smoking cigs, and i tried my first zyn (9mg, quickly realized it was a mistake and spat it out.) i didn’t get drunk enough to throw up, but i did go nonverbal on a chair for an hour. i sobered up before i turned in, but i was steadily sipping a beer for four hours before then. i did not sleep that night so when i left in the morning i was more exhausted than i was anything. i worked the following night with no sleep and had terrible brain fog, with no other hangover symptoms. i slept a normal amount of time after my shift, probably 8 hours, and woke up the next morning with brain fog as well. almost just as bad. i’ve been consistently eating and drinking water. the next day i ended up having someone cover the back half of my double because i couldn’t work it. that night, i slept from 3am to 1pm, and still had brain fog all day. last night, i slept from 2-3am to 1pm again and i still have terrible brain fog and am struggling to stand up straight without swaying. i’m a relatively healthy person, i work out regularly (weight training and cardio), but i do eat on a deficit to lose weight. i’m 5’ at 125lbs right now, and since i drank, i haven’t been counting my calories and have been focusing on feeling better instead. what else can i do to get rid of this, and why are the symptoms so prolonged and so bad??