When I urainate it hurts?

UTI. Sounds like a urinary tract infection. You can try to clear the infection by increasing fluid intake and consider using over-the-counter bladder medications to help with irritating symptoms. If not improved or symptoms worsening, you need to be evaluated by your physician and likely started on an antibiotic.
Probable UTI. Please get it checked out with a urinalysis, then have dr. Or nurse practitioner prescribe an appropriate antibiotic.