Thank everyone for the support and responses. *Hugs back* We've made an appointment with the vet but the earliest we could get one was for tomorrow morning. She still seems active and normal. But I've been checking/changing her bedding every few hours to see if there is any more blood. Each time I've found just a tiny bit.
Hopefully it's something that can be treated and she'll be okay. I've never been to this or any vet before as she is my first pet. Wish us luck <3