I really need advice...

I just found out in pregnant..5 weeks.. And I couldn't be happier, but I find myself obsessing over reading miscarriages and if something will happen to my baby, chemical pregnancies and I just can't stop. I'm so scared something will happen. This is my first pregnancy and I'm a pretty healthy person. Has anyone else done this? I just don't know what to do I know it's driving my dh crazy.