Depression during pregnancy?

Is anyone else or has anyone else suffered from depression during pregnancy??

I am so unhappy. I dont want to like harm myself or others at all!! But i am miserable and so unhappy.... i know i should be grateful to be pregnant but ... i really didn't want to ever go through the mental and emotional roller coaster i did with my last two.. and now here i am with a suprise blessing but...idk i just dont remember ever being this miserable and unhappy during my last two pregnancies. Just after i suffered with ppd and ppa and pprage and... idk.. i guess im just looking for someone to talk to ? Vent to? Tell me how they coped??

I have an appt the 29th and plan on expressing how i feel to my dr.