I'm not sure, but I don't *not* believe some things can be passed through families and played off as 'bad luck' or a 'curse'

For example. I have a older sister, and between her and I there was another sister who was stillborn. We have always spoken of her and she is part of our family.
As a tribute, my older sister wanted to name her first child after our angel sister and chose her name. My niece was stillborn at the same gestation as our sister.
Coincidence, perhaps.

I do believe in 'bad luck'.
I believe that all things will work out in the end, and all the hardships we suffer through will pay off one day and we will be rewarded. Be that in this life or the next.