Alcohol does affect blood pressure amongst a lot of there things. So the doctor has diagnosed you with high blood pressure then you must be on medication or they are looking for you to make lifestyle changes in a matter of weeks to return for another test to see if you need medication? Is there a history of high blood pressure in your family? Are you overweight? These two influences would far outweigh weekend binges; if neither of them are applicable you have your answer.
The top reading is not that relevant but the bottom reading is very high so hope you get it sorted.