Pumping and storing

Brittany
Baby is 5 weeks and i just pumped for the first time after a feeding... i was able to get a total of 2.5 oz, i dont plan to give her a bottle atleast for a another month... my question is should i freeze this amount of milk or wait til the next time i pump to perhaps freeze a 4oz bag? Since she efb's i have no clue how much she is actually drinking?