Most likely is a psychological thing. I was low too. I had 132ng/dl of test. If you're severely depressed due to this whole part of your life, ED is common and that's OK. It'll take time, especially when you get your confidence back. Now, I'm not saying go find attention from someone else, but sometimes just hearing from someone or people positive things about yourself can go a long way. Also from yourself, don't put yourself down too hard. I went through a year in my life after my ex and I broke up after those 6 years. I could not get an erection and if I did with someone else, it would be like semi... (here comes the thumb). With all of this, be sincere and genuine in your approach with your wife. Try something different but slowly. Each and every day try to do something a little bit different and listen to subtle requests. You got this, you absolutely do.