Hi,
Urine containing blood in it is called hematuria. Several health issues can cause this, such as: urinary tract infections (UTI's), kidney infections, medications, or strenuous exercise, etc...Whatever is causing this, you must go see a doctor about it. For extra support, take a close friend or family member with you to your appointment (having someone w/you can help calm your nerves and keep you distracted while you wait).
Take Care