Prostatitis: Given the patient's symptoms of mild urinary discomfort, low-grade fevers, chills, penile discomfort, and genital irritation without dysuria or discharge, prostatitis is a strong consideration. The recent elevated blood pressure readings could be related to discomfort or pain. The lack of response to ciprofloxacin, a common treatment for urinary tract infections, might suggest a need for alternative antibiotics or further evaluation for prostatitis.

Urethritis: Although the patient denies discharge, urethritis could still be a consideration, especially if the discharge is minimal or intermittent. The presence of genital irritation and penile discomfort supports this diagnosis.
Urinary Tract Infection (UTI): Despite the lack of dysuria, a UTI could still be present, especially if the infection is not causing significant irritation to the urethra. The mild urinary discomfort and low-grade fevers could be indicative of a UTI that is not responding to ciprofloxacin, possibly due to resistance.
Epididymitis: This condition, often associated with testicular pain and swelling, could also present with genital irritation and discomfort. It's a consideration, especially if the patient has not been thoroughly examined for testicular tenderness.

Testicular Torsion: Although the patient's symptoms do not strongly suggest testicular torsion (which typically presents with acute, severe testicular pain), this is a medical emergency that must be ruled out due to the potential for testicular loss if not promptly treated.
Kidney Stones: While the patient does not report severe pain or flank pain typical of kidney stones, it's crucial to consider this diagnosis due to the potential for severe complications if a stone causes obstruction.
Septicemia: The presence of low-grade fevers and chills could indicate a systemic infection. Although less likely, septicemia is a life-threatening condition that must be considered, especially if the patient's condition worsens or does not respond to treatment.

Reiter's Syndrome (Reactive Arthritis): This condition, characterized by arthritis, urethritis, and conjunctivitis, could be a consideration if the patient has recently had a bacterial infection and is experiencing genital irritation and discomfort.
Genital Herpes: Although the patient denies visible changes, genital herpes could present with discomfort and irritation without obvious lesions, especially during the initial outbreak.
Tuberculosis of the Genitourinary Tract: This rare condition could present with chronic symptoms of urinary discomfort, low-grade fevers, and genital irritation, especially in patients from areas where TB is prevalent.