Depression and TTC

Last June my son passed away 12hrs after birth. He was full term but I developed a bad infection somehow and it crossed the placenta. I almost died as well. Because of everything that happened I now have PTSD and severe depression. Last month we got the ok to start trying again. I read that it’s harder to get pregnant when you’re depressed. Does anyone know if that’s true? I’m just worried I won’t be able to get pregnant again and all I want is a baby.