Is this gonna cause me problems?

Hello. I am 18 (in the uk so only just legal) Is it going to cause me problems if I only ever drink alone in my room, do so more than once a week, and drink specifically abt 350ml vodka each time (am female and underweight for my height according to online tools). oh and also i drink this amount over like 3 or 4 hours maximum. am i stupid or not? will i be fine and am i just being overdramatic? people keep saying that they’re worried but no one i hang around drinks so maybe their perspective is skewed. idk. will probably delete this tmrw