I've had the following symptoms on and off over the last few weeks and I'm starting to panic that I have pancreatic cancer.

I will start off by saying I was diagnosed with GERD years ago and put on Omeprazole which was a life saver.

This time round I've been on the Omeprazole about 4 weeks and although it's eased some symptoms, I can't see a huge difference.

-Indigestion feeling
-Burping (sometimes with reflux)
-Nausea in morning (has improved since sleeping upright)
-Burning pain under left breast
-Dull ache/Pain in mid upper back - can be relieved with stretching or sitting up but then comes back.
-Watery diarrhea for the last few days.
-Very mild pain upper right abdomen that isn't always there
-Sometimes have trouble swallowing and have episodes when it's like I stop breathing and have to swallow or cough - this has woken me at night too.
-Heart palpitations

I've had a lot of upset recently, wouldn't necessarily say stress, just a family member being unwell which has been upsetting.

But I'm now really worried that this is something awful and I'm going to die.

I've had recent bloods including Thyroid and an ECG and all came back fine.

Does this sound like cancer? Or just a bad flare up of GERD? Could it even be a hernia?

I'm also overweight and sit hunched in front of a laptop all-day for work.