she's slightly less than a month old]This would have been her third week of no foodWhat this animal well started before you got it? Given the timeline I seriously doubt so. A well started animal is an animal that has ate 3 to 5 times consecutively, knowing that the first meal generally occur at 10 to 14 days after hatching.I got a baby bp a couple weeks ago
This is a VERY young animal and yes you should worry, not worrying is fine when you have a bigger older animal but not one that young.
My guess is that it is food related and husbandry related so please do not assist this animal until everything else has failed assisting is not the solution at this point.
First if you have not done so
Get a 6 quarts tub, aspen bedding and a 6 inches plastic flower pot saucer to use as an hide. Use about 1 inch of aspen in the tub. Provide temps no higher than 88 on the warm side.
Once you do that leave the animal alone for a week (NO HANDLING) and offer a LIVE hopper mouse in the enclosure. Yes it may be hard to find , and you might not want to feed live but all that does not matter (check CL and specialty reptile shop for live feeders), this is a young hatchling and it needs stimulation and it nees to start eating for you.
Until the animal eat for you NO MORE handling, once the animal is well established (5 consecutive meals min) you can start handling and attempt to switch food.