I'm worried that my unborn baby might be deaf?

My great granddad forth in the 2nd world war, and a bomb exploded next to his ear causing him burst eardrums and deafness in his right ear, as a result of that my granddad was born deaf in his right ear and out of his children my auntie is also deaf in her right ear, I was diagnosed with hearing lose in my left and deafness in my right when I was born. Is the anyway of detecting deafness in my unborn baby? I love my bub to bits and would like to know so that I can prepare for the worst and give it the best life possible!