Suggest Treatment For Recurring UTI And Cramps In Back And Stomach

My daughter, who is recently married and lives out of state, has had a UTI and was on an antibiotic, but the symptoms came back shortly after she finished her antibiotic. She was out of town yesterday attending a wedding when the symptons returned, and was unable to see a doctor. Tonight she feels back cramps and is sick to her stomach. Are these symptoms related, and does she need to see a doctor tonight?