Makingitright,
Wow, you have a great family history, which is certainly in your favor!
I don't know about the showering issue with the adhesive sensors. When I had my monitor on they told me to sponge bath but that was for only a day and one can get away with missing one shower. I imagine that they have a solution--perhaps teaching you how to take the sensors off and reapply?
One word of advice: you're 29 and you still have many years ahead of you. Stop smoking now and let your body heal it's self from the effects. I've smoked for 33-years and have severe vascular disease, CAD, CHF and Hypertension. I'm fighting now to quit and trust me, it is a harder fight at 56 than it is at 29. You have the great family history but don't rely on that and damage your body in the meantime with cigarettes. I know, I hate the stop smoking lectures too!
Good luck and let us know how your tests turn out. I'll keep you in my prayers.