How do I stop ?

How do I stop being so concerned & pessimistic..? I suffered a blighted Ovum in August. Thankful I am now pregnant again around 4 weeks 4days. My fear is that it will happen again... I know it’s something that I have no control over it’s just aggravating how much energy the FEAR of going through that again is bothering me... just needed to vent. Has anyone suffered blighted ovum and have a success story soon after? Also, no symptoms yet...I know it’s early but it still freaks me out....