Starting the conversation again with my wife

It’s been 6 months since I had my problem out of no where. Went limp and my wife didn’t react well. Then it was 2 months later when I was expecting an encounter and couldn’t even get hard. She didn’t want to keep going. Tried to bring it up but she didn’t say much back when I told her I can get the first time it happened out of my head. She just said she feels like it’s something more. I haven’t brought it up again and it is eating at me. And I don’t know how to bring it up again. What to say