super depressed and 18 weeks

Want to know what is it some of you ladies due to cope with stress and depression while pregnant. I suffer from depression, anxiety and panic attacks. But it has been 2 1/2 years since anything. My family (2daughters 13 and 8 and my husband) are so wonderful and perfect. I am so afraid I will affect them if I stay this way. Everyone seems sad because I'm sad and they are worried about me. Don't want to be this way. I'm either fusing all the time about little things making a big deal or just really quiet and to myself a lot .