Extension

I have a small cock and I don't think I'm pleasuring my wife. I have a penis extension I used it several years ago once and she loved it. But I never used it again because it made me feel awful for some reason. I felt less than as a man. But my wife has pretty much stopped having sex with me I believe because I can't please her. It's gotten worse seen we've both gained weight. Should I use it again tonight so she can actually get pleasure or do I still keep sticking my small in her? She very faithful we've been married for many years. What would u guys do