combat new mommy fears...

Hi I'm 7 weeks exactly today! I'm so excited for this pregnancy but all I can seem to worry about is miscarriage. I think about it a lot and I can't relax. so far, my pregnancy has been super duper healthy and I go to the doctor at 8 weeks! but I almost feel like I can't enjoy everything. this is my first and I was wondering how I can combat these new mommy fears. Any opinions on looking towards the bright side of things? I'm even hesitant to purchase anything so far because I don't want it to be for nothing. /: