Fears of ttc after miscarriage

I had a miscarriage on January 30th of this year. I was only 5 weeks but it tore me and my fiance apart. We are ttc now but I can't get the fear of losing another baby put of my head. I have been blessed with 4 beautiful babies and I alot people say 4 is enough but we feel one more would complete our family. I'm just terrified of it happening again. As anyone else ever felt this way?