How do I help my husband with depression???

My husband and I are both Christians. I believe he is very depressed! He doesn’t want to do anything. Last night I asked him how he would describe himself and he said “worthless and a waste of space”. He won’t talk to ANYONE but me. He says the only thing he loves in life is me and our baby (I am pregnant with our first). He hates being around people, has no desire to do anything fun, gets very angry for no reason. He thinks so little about himself, and I have tried everything to help him! And what I don’t understand is that he is and AMAZING and BEAUTIFUL person inside and out! How can I maybe help him or get him to talk to someone???? I am trying so hard to stay strong for him!