Feeling lost

Jill
My dad has lung cancer. Once I found out I put trying for a baby on hold till my friend said her main regret is her dad not meeting her son so when the plan seemed more positive I thought I want my dad to meet his grandchild and now I'm 6 weeks pregnant. Well the news today isn't good and I think it's palliative care one for my dad now. 
My heart is breaking. I feel so guilty I've fell pregnant and feel so selfish that I have and how do I tell my parents when they are going through this. 
I feel so emotional and worry how I will cope with a baby if at that time my dad is really unwell. 
I have cancer. It's the most cruelist evil disease :(