Megan, there are many possible causes for blood in the urine(hematuria). The origin of the bleeding can come from the upper(kidneys or ureters) or lower(bladder & urethra) urinary tract. Blood seen only under the microscope(microscopic hematuria) is usually of a benign nature whereas gross hematuria is potentially more serious. With gross hematuria, it is important to note the relationship of the bleeding to the urinary stream. If at the beginning of urination(initial hematuria), the source of the blood is almost always in the urinary canal(urethra). If at the end of urination(terminal hematuria), the source is usually the bladder neck. Bleeding throughout the entire stream(total hematuria) is due to bleeding that is initiated in the urinary bladder or upper urinary tract(kidneys and/or ureters).
Some of the common causes of hematuria include infection, tumors, stones, and trauma(injury). In order to look for the cause, it is necessary to consult a urologist. A history, physical examination, urine cytology, and other laboratory tests are done. Visualization of the kidneys by imaging studies(ie IVP, ultrasound, CT or MRI) and examination of the lower urinary tract with a cystoscope are usually required. The normal CT you had(assuming it was a good quality study) generally will rule out upper tract diseases.
In summary, consultation with a urologist is needed to determine the cause and seriousness of the hematuria. He/she will review your CT and determine if any other studies of the upper urinary tract are indicated. At the very least a cystoscopic examination of the bladder is necessary. Your other symptoms of dizziness, fatigue & pelvic pressure may or may not be specifically related to the cause of the bleeding. Let me know how you make out. Good luck!