I also think there is something to this.
First of all, sorry to hear you're dealing with this. I've been there and it was really stressful. But I came out the other end and things are good again, so don't lose hope. Instead, just forget about it. Hard to do, but just stop trying to have sex unless you're REALLY ready to go. If you force it at half mast you risk physical injury to your penis. And forcing it when you're not really ready only feeds the mental gremlins when, once again, you get ED.
Stop watching porn. Period. You may feel the urge, but just don't do it. You want to recondition yourself so that your wife is THE source of sexual stimulus in your life. Also, watching dudes with donkey schlongs and their female counterparts faking ecstasy will not help you with any subconscious feelings of inadequacy that may or may not be affecting you. Remember, they're actors and most of those guys need Trimix to perform in those scenarios. If you haven't already done so, talk through this with your wife. Be 100% honest about how it makes you feel and how hard it has been for you. Get to the point where you're both willing to try and if you lose it, just laugh and give up and say "well, guess that's not happening right now". Again, don't force it. When that happens and you have to give up, just work on your oral skills - I bet your wife won't mind at all. If you wake up with a good nocturnal erection that seems to be sticking around, lube that thing up and wake your wife up. After a period of this, the ED may become so trivial that the ED anxiety may lose its power.
Nobody likes to hear that something is "in their head" but with ED that is a huge factor. Once it happens once or twice, the anxiety is there all the time. The fact that you do experience nighttime erections shows that at least physiologically, things appear to be working fine.
Based on your labs and protocol, I don't think there is a magic bullet drug/lab value for this that you're currently missing.
