PMO and depression

So it seems that going on this journey goes hand in hand with dealing with depression. Do you wonder if you are in this situation because you suffered from depression, prior to any issue with pornography and masturbation? I say this because I often wonder if I find myself prone to having addiction problems with pornography and masturbation because I am depressed, and not the other way around. Obviously it gets into this cyclical problem, but is this a problem that people who don't suffer from depression ever deal with? It recently came out later in life that my dad suffers from depression, but he didn't even realize it and thus start getting help until like 5 years ago. Once he did he is like a different person (for the better). I wonder if I too suffer from depression? If I get help with chemical imbalances, will that also help with my problems for pornography and masturbation?

I don't know how to explain it without being vague, but sometimes I feel like I could suffer from depression, but other times I don't. Overall I typically feel happy, the only depressed times I feel are when I am dealing with my problems with pornography. I almost always put on a happy outward appearance, hell if I even went to my wife and told her I worry that I might be suffering from depression, that it would totally blind side her. Just letting my mind wander.