The character of Sheldon Cooper was inspired by a computer programmer personally known to series co-creator Bill Prady. He is named in honor of actor/producer Sheldon Leonard and Nobel Prize Laureate Leon Cooper.
The infection is caused by bacteria. However, excessive use may irritate you. Soda also dehydrates you, and for proper urinary health you should be drinking lots of water, and also cranberry juice. Your physician was definitely right in telling you that it could have made the bladder infection worse.
Coffee and UTIs. Individuals with urinary tract infections are often asked to avoid caffeine products, including coffee. Coffee cannot cause a urinary tract infection, but it can intensify your symptoms. The caffeine found in coffee can irritate your bladder and cause bacteria to stick to the lining of your bladder.