Blood in urine

Hey, I know I've posted on here a lot but I feel as though you're the only people I can talk to. I'm 18 years old and I've been struggling with each other issues with can be read on my profile.

 

But on Tuesday I went to hospital because I was having pain in my side and I though it was appendicitis. While I was there I did a urine sample and a blood test. The blood test came back fine but the urine sample showed some traces of blood but the doctor said that it isn't a number that the hospital are concerned about. And me being me I am worrying so I just wanted some reassurance or some comfort.

Thank you

Abbie