seriously, any weigh in other than you official one is a waste of time and completely meaningless- you could be +3lbs today and -7lbs tomorrow because that is what your body does
And 1 glass of wine is what, 6 of the 105 syns you get in a week! Clairebear is right you have two choices - flexi syn and accept you may not lose this week or give yourself a syn limit
But really- it is your daughter's 21st - a special occasion so enjoy it!