Hypertension?

I did a search on hypertension on this site so it seems like I'm am not alone here and there is quite a resource to draw from. So perhaps I can get some idea what I am looking at with my situation. I'm only 34, started swimming again nearly a year ago. Partly because I new I had high blood pressure, but mostly I started swimming for overall health and fitness benifits. Since then I have lost roughly 30 pounds. At 6'2" I now weigh about 200 pounds. I would expect that all this work would have some impact on my blood pressure. Especially since I rarely drink, and my diet isn't terrible. I generally eat healthy meals. But the sad truth is that it hasn't changed. Nearly a year ago my BP was 140 over 100. This week... The same. Absolutely no change!!! As a result, my doctor put me on Lisinopril, an ACE inhibitor. So naturally I concerned about a few things. 1. Does this mean I will be taking BP medication for the rest of my life? 2. How will this impact my swimming/ability to train? is there a better medication that I should ask about so there are not adverse effects? 3. Do I need to start taking things easier in the pool? 4. Since I have a family history of hypertension does this mean there is really nothing I can do aside from medication? 5. Anything else I need to be concerned about? Thanks in advance for any advice or helpful comments. Kevin