Losing someone to Cancer

I lost my maternal grandma 4 years ago to pancreatic cancer, and my mom last November to pancreatic/liver cancer.

By the time we found out my mom had it they told us she had 4 months but it was only 2 weeks. We discussed so much during that time but never really what was her first sign she had it. She complained once about being in pain before she was diagnosed and that was it. The one thing I remember her telling me a couple times was that even way before she was diagnosed she was terrified of it being cancer but she never told any of us.

The doctors told us kids to be cautious since it can be genetic. Now, every time I'm having any kind of weird upper abdominal pain I almost have a panic attack. For example, for a few days now I've been having what can only be described as discomfort in the upper abdominal area; I'm so terrified I've had a few bawling episodes and almost vomiting. I can normally talk to my family about anything but not this; to my knowledge none of the others have this fear. It makes me feel ridiculous but at the same time it's a justified fear. I just can't figure out how to handle it or what to do. I'm learning how to cope with losing my mom, but I haven't even began to cope with this.

I just wanted to reach out and see if anyone on here has lost someone due to cancer and if they've developed this fear. I want to know how you handle it? Any kind of advice or even kind words would be appreciated.