Anyone experience 2 live births, 3 miscarriages, another live birth, and then another?

This is probably an odd question. I have 2 kids 2015, 2016 then had 3 miscarriages. I ended up having a live birth Aug 2019. I just found out I'm pregnant again with baby number 4, and final. Due in 2021. I'm worried about miscarrying. I read after having 3 in a row my rate of having a miscarriage is at 43 percent. Yet I also read that after a live birth your rate is only at 5 percent and 4 percent if you've had all live births. Anyone have any experiences like this and had a 4th healthy baby? Or something like that. I'm stressed.