Pregnant and worried

I'm currently 19 weeks pregnant today. In March this year, I gave birth to my baby due to mid-term pregnancy termination as baby had Downs Syndrome, half a brain and physical deformities that will need a lifetime of surgeries. I am scared for my current pregnancy. All seems well and the first trimester screening test (oscar) showed very low risk. But I can't help feeling the fear that something will be wrong with this pregnancy. We will have the 20 week detailed scan in 2 weeks. I cannot stop feeling anxious about it till I get sleepless nights. My husband tells me its all God's will and we have to be patient and calm. I just can't help it! 😢😢😢