Fear of miscarriage

How do you get over the fear of a miscarriage? I thought each week that went by would get better not worse but I guess as I’m getting more attached I’m getting more scared. My first ultrasound is in a week and I’m just feeling like I’m walking on eggshells and my husband is beginning to get a bit frustrated with how worried I am all the time. I’m 7 weeks and 4 days.