I hope you manage to go see your Pdoc today! It's good you're trying to hold on.

I don't know what exactly he'll do, does he already know you're currently struggling with depression? If so, hopefully he assesses how bad it is and talks to you in whatever way is helpful to you. If not, I think it'd be good to tell him straight away that you're currently struggling with something you think is depression. Then you guys are on the same page and you can be assessed properly.

I hope things go well. Remember that people, at least on here, are there to talk and that hopefully soon things will change again and you'll feel better.