Pregnant again

So after losing my first child on June 28th 2018 I am currently 5 weeks pregnant with my second child and I’m honestly terrified that the same thing will happen I’m due in September 2019. My first child passed in the womb at 17 weeks because a blood clot had formed in the placenta. I’m taking baby aspirin once a day as instructed by my ob but I’m just scared to lose another baby.