Some encounters may take longer than their allotted times, while others may take less than the time allowed. It is NOT necessary to use the allotted time for any particular encounter if you are coding based on the documentation of the three key components. In other words you are not penalized for being efficient.
If you are only going to have 1-2 drinks, you should be fine to breastfeed. If you are going to binge drink, then you should wait two hours per drink before breastfeeding. Once the alcohol is out of your blood it is out of your milk. And pumping & dumping does nothing to speed this process up.
Normally, if you haven't eaten for a while, your body uses its liver stores of glucose (glycogen) for energy. In addition, alcohol can increase or prolong the action of your insulin or oral agents. In fact, the glucose-lowering action of alcohol can last 8 to 12 hours after you had your last drink. Delayed low blood sugars (hypoglycemia) may occur up to 16 hours after heavy drinking. So if you overdo it, keep your blood glucose levels topped up with carbohydrate.