i am a male of 68. Not diabetic. No BP. now since...

i am a male of 68. Not diabetic. No BP. now since last few years i can't hold my pee. its getting worse now. In my opinion its more relating to my brain rather than my physique. For example, i feel like going to toilet but not having a very strong need but as soon as i start heeding toward toilet the pressure is getting developed. by the time i enter toilet, the pressure (on my bladder) is so high that most of the time before i open up my zip, few drops get released and it spoils my trouser. In the night also i have to getup at-least one or two times with a feeling of big pressure on my bladder although no much quantity released (May be 100 or 150 ml only)