Depression pregnant

I’m 18weeks pregnant and I haven’t been feeling this way since very long time ago. I even called the suicide line this weekend but hung up bc I’m ashamed to admit I’m depressed. I’ve talked about it to my husband but I try to act normal when he is home. This pregnancy was not planned, I found out when my daughter was 10 months, I panicked in the beginning but then started to see it as a blessing. But right now there’s so much going on in our lives, we struggle with one baby so I don’t imagine when we get another one. I haven’t worked this week because I hate my job, I don’t have any friends or family here so I’m home everyday and its drives me crazy. My daughter is sick, she refuses to eat and I’m failing as a mother. I wish it could stop, I just want peace of mind