You have a combination of symptoms that need to be sorted out. It is common for a female to void for a specimin, show bacteria in the urine but the culture shows minimal or no organisms. That is usually due to bacteria from the vagina that got picked up by the urine as it passed thru into the cup. You got treated anyhow and got a vaginal yeast infection, not uncommon when women get treated with lots of antibiotics. The good bacteria in the vagina are eliminated and the yeast have an opportunity to grow. You eventually got that cleared up but you still have frequency, urgency and small volume voiding, plus what sounds like urge incontinence. You state the pain is "not acute" and mild. Its unclear from your history if the pain is related to the bladder, either during filling or pain while voiding, or is this pain from another cause.
This is either overactive bladder with incontinence or interstitial cystitis. Overactive bladder patients have frequency and urgency to void, plus they may have incontinence and dribbling. They usually do not have pain in the bladder or vagina with a full bladder or while voiding. Treatment is with medications that reduce urgency to void. Ditropan is the most widely used medication. Your Urologist would know what to prescribe. Interstitial Cystitis patients also have frequency and urgency, but also have pain, pressure or discomfort most often in the lower abdomen or vagina. Treatment for this problem is more difficult and you would need to see an expert who specializes in IC. Your urethral sphincter muscle could be weak causing the incontinence as you noted.
Your history is complex and an experienced Urologist needs to work you up for either overactive bladder, urethral incontinence or interstitial cystitis or some combination. The correct diagnosis needs to be made. The most experienced Urologist in Ahmedabad, India for this problem is Dr. Nagendra Mishra at the Jivraj Mehta Hospital. Good Luck