Loss of mother

Hey guys!! Last week, I lost my momma to liver failure. She had hepatitis c and acute hepatitis b. She ended up slipping into a coma from all the toxins released by her liver. The reason I'm bringing this up on here is because my fiance and I are trying to have a baby, but I'm afraid me being over emotional is screwing everything up. Any suggestions with coping? My mom was my best friend and my world. I'm trying to keep positive about everything but I do have a history of depression. My fiance and I already have issues with conceiving because he is a paraplegic and I'm terrified that my stress and emotions will mess with everything. We already know he can have kids because he has an 8 year old son. Any suggestions with this would be amazing. Thanks in advance everyone :)