Having A Period Without Blood What Does It Mean When A Woman Pees Blood Without Being Having Your Period Or Not Sure Of Being Pregnant?

What does it mean when a woman pees blood without being having your period or not sure of being pregnant? - having a period without blood

I had my time in a week and a half, and last week had sex with my boyfriend, and 3 days later I began to urinate blood. This could be a miscarriage? I begin a new cycle? ......