Okay, with regards to peeing. Soon, you will be 21 and at a football game. You will be drinking a lot of beer. The peeing problem will go away, trust me.
With regards to the other, this is not uncommon. There are three issues here:
1) "Confused penis" because you are concentrating on other things. I lose my erection when going down on girls. It's because I am concentrating on what I am doing - there is a lot of technique that needs to occur and it IS about pleasing her, not you. When you are trying to get that goddamn condom wrapper open, you are concentrating on that, and you lose the sexual interest. I would suggest opening it prior to the encounter (if possible) so all you have to do is grab it, unroll it, and bury it!
2) "Confused penis" due to moral issues. This one is REALLY simple. Once you have actually been in the holiest of holies, you will realize the greatness that is a woman's body. You will never worry about this again. It feels far too good to be wrong. And if lovin' the puss is wrong - baby, I don't want to be right!
3) "Confused penis" due to performance anxiety. Start with a virgin, you can't suffer by comparison. Other than that, it is a complicated issue that can require professional counselling.
PS: People like you that have been brainwashed into thinking Viagra is the solution should be smacked. Your penis works fine, it's your head that is screwed up!