Calming anxiety

I need serious help. I am struggling so bad with this Rainbow pregnancy. This is our first pregnancy after our miscarriage Dec ‘16 and I am a big ball of stress. I spend all day either googling symptoms or checking my underwear for blood. My house is a wreck, my two year old DD is basically on her own because I’m too afraid to over exert myself. I cannot continue living like this, but I’m so afraid that I will lose this one too and my miscarriage in December nearly killed me. Please tell me I’m not alone. My sister in law thinks I’m crazy. What Can I do to ease the anxiety?