Is this how it begins?

My dad passed away when I was 10.

He never smoked, drank, or did drugs.

Honestly, I've never met a person as kind as he was.

...he passed away when he was only 30.

I'm 15 now, and I just began experiencing 

the "early" signs of this type of cancer. 

(My grandma told me my dad started with this)

I have an appointment with a specialist tomorrow,

they're gonna check my stomach.

I don't know if its genetic, my uncle (dad's brother) passed

away a month after my dad. That's when the doctor adviced my 

grandma, to get everyone checked up.

what do you guys think?

My belly fills with air/gas sometimes, since I was younger (just like my dad),

causing heartburn.

I often experience pain on my belly, (probably 3-4 times a month)

Yesterday I started with the nausea, lasted for two days. My mom took me to the hospital right after.

 I'm scared, not terrified, but scared. 

I'd like to know what you guys think about this...