You should have gone to a lawyer from the beginning, but at least you have one now.
I sympathize with you, but the VA is a bureaucracy, and they are not run on the say-so of veterans or their families, or even by doctors, but by a snarled mass of rules & regulations built up over decades.
You are going to learn from your lawyer that there is a "way" to package and present all of your evidence in such a manner that the bureaucrats will respond "correctly". It is going to seem counter-intuitive (it is), and the approach may even differ based upon the conditions you want re-assessed.
Your DAV rep may not have understood that, and you will be very lucky to find out that something you submitted before (which now forms an official part of your claims file), does not make it harder for you now.
If you walk up to a vending machine and say "give me a ham sandwich", you're not going to get anything. If you kick and scream and threaten the vending machine...it's still not going to give you a ham sandwich. But if you put in a crisp bill, punch in the digits for 'ham sandwich', and the vending machine does in fact contain ham sandwiches...you are much more likely to get a ham sandwich.
I'm not saying it's fair or just, but it's in the nature of the VA to be that way, so you've got to figure out the moves that will get them to respond correctly.