Help please.

(i don’t know if this is classed as asking for medical advice so im sorry if it is but i dont know) hi so i have been struggling with alc (vodka) for on and off now and the other night i had a lot to drink, more than half + quarter (which is already bad but i cant explain it because i have drank and it’s hard) anyways i had a lot and my head was spinning i couldn’t read texts normally unless i squinted my eye which helped a little bit but not that much, and the thing is this NEVER happened before. im severe dependency and the feeling was different, like *why am i feeling like this i drank so much shouldn’t i be like kinda out of it? ” i feel like it’s happening again, im typing normally, i mess up my spellings but i fix them, my head feels okay etc, it’s just because it happened before and i want to know if this is normal? (i am 19 if this helps anyone?? idk)