Diagnosed with Moderate major depression + Panic disorder with agoraphobia

[AirForce99]

I Finally had a 2-hour meeting with my VA Psychologist . I checked the MyHealtheVet Blue Button and I was diagnosed with...

1. Moderate major depression, single episode (SCT 15639000)
2. Panic disorder with agoraphobia (SCT 35607004)

I've been recommended to go into a 12-week therapy program which I start soon.

I know these issues are due to my service connected lower back issues/pain. But there aren't any notes saying this is a fact.

Do I just go to the 12 weeks of therapy and see if it shows up in my notes, and if it does, file for both of the issues above secondary to my lower back pain?

And what if they won't write a nexus, would I file anyway and hope the rater sees that my back causes this? 

At any rate, I'm happy to be getting help and if it's not worth filing I'd rather not waste time.

Just not sure if I should wait until after my 12 weeks of therapy so I can see what they say, or I should file now and let the C & P do that work.

[broncovet]

File now, unless you can afford to give up retro.