Hey buddy. I have put a link to a long post I wrote about my struggles which sound similar to yours (Trying for a baby, IVF and psychological erectile dysfunction). I know it’s incredibly frustrating but I found recently that things spontaneously started to improve. It’s difficult to say which thing helped so I think it must be a culmination of different things (psychosexual therapy, meditation, and reading about it). I have stayed away from viagra because I don’t think it has any role in psychological ED.
Patience. Perseverance. And dedication to the techniques described on MOJO. It HAS worked for me, I noticed a real improvement after a few months of MOJO and intermittently it does still happen but it’s better than before.
For a psychological block its a psychological solution. Read about other people’s experiences. Have confidence in yourself that it has happened before and will happen again.
Taking it really slow is also a big help. Try for one or two nights asking your partner to take penetrative sex completely off the table and doing lots of other things, it takes all pressure off you and you can both enjoy something else.
Make sure she is reassured that it is nothing to do with her.
Let me know how it goes.