This is NOT a medical opinion, but it is my experience and advice having had prostate problems myself for about six years.
My brother was diagnosed with an aggressive form of prostate cancer some six years ago (by the way, he is at present fit and well!). As I was experiencing some problems of my own, I went to see my GP, and what follows is drawn from what I have learned as a result of the process of my own treatment.
Step One: See your GP: he/she will do a rectal examination (uncomfortable but brief and not painful), and probably also order a blood test for PSA (prostate specific antigen.) Most males over 60 have an enlarged prostate, which can alter patterns and/or sensations of urination, but is by no means necessarily an indication of prostate cancer - most likely simply BPH (benign prostatic hyperplasia) which can be treated with medication, or, if extreme, relatively minor surgery to ease any obstruction. Most such males will also have measurable levels of PSA.
Step Two: If the PSA levels turn out to be high you will get an appointment with a consultant who will discuss the situation and what might or might not be done about it. You may be offered a biopsy, and helped to decide whether or not to have one taken. If you are offered a biopsy, and if you opt to have it, and if it shows any malignancy, then the grade of the cancer will be assessed, and possible treatments discussed. Many prostate cancers are non-aggressive and may require little or no treatment. Even aggressive cancers can be successfully dealt with if treated soon enough (my brother being a case in point).
So if you are experiencing troublesome symptoms (some or all of the following: frequent need to pee, urgent need to pee, difficulty starting to pee even when urgent, hesitant stream, inability to empty the bladder, dribbling afterwards), then keep calm but don't do the male thing and ignore it...see your GP, and you will probably find its nothing much to worry about, and there are things that can be done to help you that are not all that embarrassing, undignified or unpleasant. If, at the end of the process it does turn out to be cancer, and more extreme measures are indicated, then you'll be glad you sought help early!