Previous miscarriage has me worried

I'm 5 weeks 6days pregnant with my third pregnancy. I had a miscarriage with the first but then had a healthy baby girl the following year. Well we're pregnant again and I'm really nervous about carrying to term. Appointment isn't until The 16th and I think I will have driven myself crazy with worry by then.. No reason to think I might miscarry other than the fact that I have before and right now I don't have many pregnancy symptoms. I know it's early on..any advice on how to calm my nerves?!(learn more on Glow: