Ummmm, a scale...
A 2 year old female should be on something larger than an adult mouse. Those tend to top out around 32 grams. Definitely too small for a 2 year old BP.
For comparison, a small rat (what you're 2 y/o female should probably be eating) weighs in the 50-89 gram range. BIG difference in weekly intake.
Without an accurate weight of the snake and the prey item and without being able to see the snake and prey item it's impossible to know for sure, but it sounds to me like the snake is hungry.