Borracho, Emborracharse

[AndyP]

Hola everyone,

I am a little confused with the word 'drunk', 'borracho'.
Whilst in Spain I have said: 'Anoche estuve borracho','Last night I was drunk'.
A Spanish person who speaks very good English informed me that it should be 'estaba borracho'.
I don't/didn't understand as to me, I was drunk, that has a start and end point therefore it is Preterite = estuve
Am I incorrect?

Afterwards I looked at the Refelexive verb 'emborracharse'.
Again my thoughts are to use the Preterite form and say 'Anoche me emborraché' NOT the Imperfect 'me emborrachaba'.

From all these conjugations how would a Spanish person convey how he/she got drunk?

'Anoche estuve borracho'
'Anoche estaba borracho'
'Anoche me emborraché'
'Anoche me emborrachaba'

Thanks again.