Depression

I gave it a while to see if it was just hormones and moodiness but it’s past that point. I feel hopelessly sad so often and am sometimes upset about nothing, and sometimes about everything that’s wrong all at once. I don’t know how to go about addressing depression I’ve developed during pregnancy or how my doctor would even treat it, but I cannot be like this the whole time, I’m 22 weeks right now. I started sobbing in public today for no specific reason at all and it’s making me miserable. Some days I have no interest in leaving bed. Has anyone else experienced anything like this? I just don’t know how to go about any of it