Navy Scoundrel

I'm service connected for migraines at 50%. I have been diagnosed by my VA Dr with "major depressive disorder" & "persistent depressive disorder." I filed a claim for depression, which was denied. The language of the denial letter was more about the depression not being service connected, rather than secondary to migraines. I was probably not specific enough in my claim. I was advised to not appeal due to the how long that takes, & instead to file again after one or more Dr visits. After my last Dr appointment, there was something new in the Dr's notes, specifically the listed diagnosis. They read as follows: "DIAGNOSIS: 1. Major depressive disorder. 2. Persistent depressive disorder. 3. Medical co-morbitities, 50% service connected." Number 3 is a new addition in my medical record. I've read up on the term "comorbidity," but still unsure about it. Will this addition to my medical record hurt, help, or do nothing for me if I file another claim for depression? Thanks for any help you can give. GOD bless.