Urinary Tract Infection (UTI): The presence of a large amount of blood in the urine (hematuria), as indicated by "Blood UA POC Negative, Large 1+ Abnormal," along with urinary hesitancy, suggests a possible UTI. Although the nitrite test is negative, which could indicate the absence of certain bacteria, the combination of symptoms and lab findings still points towards an infection, possibly caused by bacteria not detected by the nitrite test.

Benign Prostatic Hyperplasia (BPH) or Other Obstructive Uropathy: Although more common in men, obstructive symptoms like urinary hesitancy can occur in women due to various causes, including pelvic organ prolapse or urethral stricture. The clear appearance and absence of significant proteinuria or leukocyturia make this less likely but still a consideration.
Overactive Bladder (OAB): Symptoms of urinary urgency, frequency, and sometimes hesitancy can be associated with OAB. However, the primary symptom here is hesitancy, which is less typical for OAB.
Neurogenic Bladder: This condition, resulting from a neurological condition affecting bladder control, could present with urinary hesitancy among other symptoms. The absence of other neurological symptoms or signs in the provided information makes this less likely.

Bladder or Kidney Cancer: Hematuria is a key symptom that warrants further investigation to rule out malignancies. Even though the patient's age and sex, along with the absence of other alarming symptoms, make this less likely, it is crucial not to miss such diagnoses due to their severe implications.
Kidney Stones: Although the primary symptom presented is urinary hesitancy, the presence of blood in the urine could also suggest kidney stones, especially if the stones are causing obstruction or irritation.
Sepsis from a Urinary Source: In cases of UTI, especially if not promptly treated, there's a risk of the infection progressing to sepsis, a potentially life-threatening condition.

Interstitial Cystitis: A condition characterized by bladder pressure, bladder pain, and sometimes pelvic pain, which could potentially cause urinary hesitancy. The diagnosis is often one of exclusion and based on symptoms.
Tuberculosis of the Urinary Tract: Although rare in many parts of the world, urinary TB can cause a variety of urinary symptoms, including hematuria and obstructive symptoms. The diagnosis would typically require specific testing, including urine culture for TB and imaging studies.