I left my dogs in her crate with usual towel and I think today she may have ate some of it... I know vet is best answer... But I don't not have money for vet x-rays and surgery

Yes, the vet is your best option. I hope you have called them,
Some things to watch for (vet will want to know these things)
Appetite, vomiting, bowel movements, attitude (normal or lethargic)
Please call them or take her in, I hope things do not get serious, but if you fear she may have an obstruction, it should not be taken lightly.
Perhaps they can work with you on the bill, offer a payment plan, or point you to an agency that can help you out.