[anonymous]

“I asked the vet if the sample i brought in was blood and she said she didnt know, that there COULD be blood in it”

Only the additional testing, that you declined, can answer your questions.
What might be true for someone else’s dog that had a similar problem, in no way might have anything to do with what is going on with your dog.
Please learn from your experience. Find a vet that you trust, go in for routine stuff, annual exams, ask questions……
I wish you and your pet the best 🙂