Why is asking for help so damn hard?

Genuine question. I've been anxious and irritable for like 6 months now and my wife keeps saying "just call your doctor" but I keep not doing it. I know what my problem is. I know what would probably help. So why is there this huge wall of resistance every time I think about picking up the phone? Is it shame? Pride? Fear? All of it? Just trying to understand my own brain here.