Thanks for your question. All the reason behind your trouble in getting an erection seems to be lying in stress and anxiety. It is the thought of not being successful once, made you restless. You are simply psychologically ill thinking that you may fail in future encounters. This cycle once started may continue for a long.  To treat with this condition, you have to change your mindset. Talk about your feelings to your partner. Going for picnics may help you. Mental relaxation is a must while this occurs. Feel as much comfortable as you can by yourself. Build up the trust in your partner and never discourage her. Meditation and yoga are sufficient in relieving stress and anxiety. Morning walks, exercises and a healthy balanced diet with more fiber and proteins will also help you with this. Boost your confidence level to new heights than thinking about medication. This is quite normal with newly wed youngsters. This is not erectile dysfunction. Abstaining from sex for a few days will help increasing your libido. Take more time in foreplay and for getting pleasured up yourself. Alcohols and cigarettes can have adverse effects with erection. Better keep away from both till your issue gets solved. Good luck.