<human>: 1) My mom had a daughter before me, born with a heart defect. While my mom was awaiting a post-op update (sister was one) she fell asleep and had a dream where my sister came to her and told my mom that she was sorry but she had to go. She also told my mom that it would be okay because she'd have a sister soon (me). When my mom woke up she was told the situation had turned critical and later that night they made the decision to take her off life support. A year later I was born.

2) That night my sister died my then-five year old cousin came to his parents in the middle of the night crying. He said (my sister) wasn't coming back. He said she visited him that night, they played together, and then she said good bye. 

3) After my grandfather's death he told my mom that he would come to her in a dream if heaven was real and prove it to her. A couple months after his death he "visited" my mom while she slept. He pointed to a spot on her torso and told her that she needed to have it checked out. Coincidentally my parents had made plans to have a full body MRI scan courtesy of my dad's insurance company. They found a (benign) golf ball size cyst in that exact spot where my grandfather pointed in my mom's dream.

Despite growing up Christian I no longer consider myself a religious person, but this shit creeps me out and I honestly just can't explain it.

Give me the gist of the text in a nutshell
<bot>: 1) My mom dreamed that my dying sister came to say good bye and that she would have a sister (me) before doctors broke the news.