Talk to Urologist on OAB Incontinence

Hello to every Urologists.. Im visiting a Urologist Professor and as per him I am eating these 3 medicines since 5 months now these medicines are too costly and costed me around 40,000 PkR until now (5 months).. The results are 20%. better than before but still i am still 80% facing leakage of urine.. I was having this issue of urge to pee + leakage + unable to hold urine + frequency urine since 2 years back..... I had no burning sensations or anything else. My question is if it is normal to eat these medicines for this time long??? because Professor says it will take time to cure this issue.