Welcome to PC HardToBeHappy. I think you will find that you have come to the right place! This whole forum is just for depression and so many people contribute to it. It's a common experience for all of us and we've all been coping with it however we can. I'm sorry you can't see someone about your depression because medication is available that helps so much. If you could go to an ER maybe they could suggest some kind of program. Also at the top of this forum is long list of support numbers for so many problems people have. If you can call some of those numbers when you need to talk to someone immediately you might feel a little better. I think you will find that posting here and communicating with people like you will in itself make you feel a bit better. You are not alone. We are here to support you.
Since you are online a lot anyway then please check out the social clubs. There are so many and my experience has been that everyone in them is kind and welcoming. I belong to a couple of book clubs and a TV club. I really like the people in them. Even though they are depressed they are often funny and always enjoyable.
It's good that you get outside with your dogs. Staying inside too much can in itself be depressing.
Take a look around and I'm sure you will find help and company that you will like.
Good luck