Depression

I've been so depressed lately, I can't concentrate, I can barely eat, barely sleep, I'm stressed over little things. I have a two year old who is in the terrible two's stage and won't listen, I talked to someone about feeling like this and they told me its probably pregnancy depression. The only kind of socializing I have is through Facebook. I'm a full time stay at home mom and my boyfriend works 13+ hours a day mon-fri. I wish I could go out and get a job but I'm a high risk pregnancy due to my liver disease. I have suicidal thoughts an they scare me, I'm afraid this loneliness is going to make me go through with my thoughts, I dot know what to do..