My DH used to have performance anxiety as well, not related to any physiological issue or his desire. What eventually helped us was time and no pressure. Don’t put pressure on yourself. When you lose your erection, just do something to please her instead of worrying about her being disappointed, or worrying about yourself. My DH rarely has performance issues now (I’m sure the normal amount). We just tried to take all pressure off him, and don’t talk about or focus on the lack of or loss of erection. But also in my situation, I found myself getting upset and asking him why? What happened? Are you not attracted to me? Etc. and that definitely exacerbated it. We are in a similar situation to you, Christians and we were virgins when we met. If you’ve only been sexually active for 6 months, I say you just need to give it time. That is not very long at all and it’s all still new and exciting. Just try to enjoy it, and relax as much as possible, and put your focus on pleasuring her and enjoying yourself rather than “staying hard”. It worked for us anyways.