faded line on pregnancy test....I'm worried!

This is my second pregnancy, the first one was a blighted ovum and I miscarried at 12 weeks. I'm terrified of another miscarriage or non viable pregnancy. I've taken several  pregnancy tests in the morning within 2 weeks and they are all showing up with a faded line telling me I'm pregnant. A friend told me a while ago that a faded line  is not a good thing and may mean a miscarriage is coming. Anyone else go through this and have a healthy baby now?