What Is The Treatment For Erectile Dysfunction?

Hello Sir, I would like to ask you a little bit persona question. I am a guy who don t have a huge sexual experience, but whenever I had in past it was always successful. But recently we went out, we dance, drink some drinks (4 beers+vodka shots+wine+another wine, may be necessary) and at the night i was having a problem with erection, it seemed all the conditions were for that (lovely partner, her naked body, fetish...), but my penis was not standing still, sometimes I was feeling something there, but that was not strong and not for long. And after the all tries I just gave her a massage and we slept together, but i was in shame all the night, I couldn t figure how that could happen, can it be serious? Because we both were trying really hard to turn me on and that wouldn t help... I am really worried and in shame, I don t know how to explain. I am just in a panic.