Will my sadness affect my unborn child?

Hi guys Any feedback will help me my story is a little long but I will try my best to keep it as short as possible. About one year ago my sister was diagnosed with a very aggressive type of breast cancer. I was by her side the whole year I she completed chemo after chemo she went through surgery and she just finished her radiation and God willingly she Will be OK. I waited for that year to pass for me to start trying to get pregnant because I wanted to be In a better state as far as mentally. I’m now nine weeks pregnant with my rainbow baby and just found out a few days ago that my dad has stage III or stage four lung cancer. I’m extremely extremely sad and I break down a lot throughout the day... Right now I’m at that point where I’m trying to except life in a different way and try to handle it differently so that it doesn’t affect my unborn child. I’m waiting for my next appointment with my doctor to explain to her what I’m going through and get answers... But what are the risks of being pregnant and being so sad? I’m so confused and I’m so scared. Deep down I’m so happy and thankful that I’m pregnant but it’s still hard for me because I don’t even know how to announce it or tell anybody While all of this is so fresh For my family and I. If anybody has any knowledge in a situation like this I would love for you to share something with me. Thanks in advance.