Can a five-month-old tarantula go four days without food?

My new pet - a Chilean rose hair tarantula - is five months old. I've had her for about three days, and the person I got her from said that she didn't eat at all the day that I got her.

I have some experience with tarantulas, but only adults that are fed every two weeks. I've never cared for a young tarantula before, so I'm not sure if four days is too long for them. She's in a completely new habitat, but she's already been dropping hairs and marking her territory, so I think she's settling in, and will probably want to hunt soon.

I only haven't gotten food to offer her yet because neither of my parents will allow me to take their car up to the pet store, and neither of them feel like taking me. However, one of them is willing to take me tomorrow. Will my tarantula be okay until then, or do I need to offer food today?

Thank you in advance to those who answer.