Since you typed d**ks I'm assuming you have more than one. If that's the case just use one that works
Before you decide to see a doctor I suggest jerking off a couple of times to make sure there is nothing wrong with you. If you can't get hard or orgasm then you may have a serious problem. If you can get hard and cu
m then you are physically fine. Your problem would just be all in your head.
If it happens again just stop and try to relax. Sit or lie down and just try to calm yourself. Tell her to give you a blow job or jerk you. Don't think about not being able to get erect and just enjoy the sensations. As it is now your own anxieties are messing with you.
Edit: I'm not going to bother wasting another post in this thread.
Since cola obviously ignored my post (for now) it's obvious he doesn't want help. Unless somebody can give him better advice then I did, I suggest that nobody else should bother with further replies.