If your B/P is still a little high, ask for something in addition to the HCTZ. A good place to start, if it will work for you, is Cozaar, which has few negative sexual side effects. There are a number of others which also don’t cramp erections, so ask about them.
I doubt PE is going to effect your B/P except temporarily, in the sense that PE may turn you on. Turns a lot of us on.
In the past year ideal B/P values have been dropped by the medical community, both on the systolic and the diastolic, lower reads being preferable to what used to be acceptable. Look into that and get yourself a B/P monitor to use at home on a regular basis until you get regular at a good level.