Can 5 beers get somone drunk?

I just drank 5 beers and i a soooo drunk. I drank them all very fast and i never drink oh by the way im 16 . so like why am i so drunk on only 5 beers...idk my brothr is sayin i am faking but i a bout to pas out like seruously ****** i fel weird. i am only 4' 10 and i only wiigh like 80 pounds serisouly