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.
Starting from this BAC, your body needs almost 14 hours to completely metabolize the alcohol. Of course to pass the breathalyzer in all 50 states, your BAC needs to be under 0.04. A 0.04 will not get you a DWI (driving while intoxicated), but you can be charged with a DUI (driving under the influence). To legally pass the breathalyzer after 12 beers in three hours, you need a little over 11 hours.