Your symptoms are likely due to;
1) Poorly functioning or non functioning gall bladder.
2) Chronic pancreatitis.
3) Peptic ulcer.
You need to get the following investigations;
a) HIDA scan; this tells about the gall bladder dysfunctions.
b) Magnetic resonance cholangiopancreatography (MRCP).
c) Upper GI endoscopy.
d) Stool exam for total fat estimation and routine exam.
e) Helicobacter pylori testing
These should be able to ascertain the cause.
Your symptoms are unlikely to be due to cancer. Worry and anxiety may be contributing to weight loss.
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.
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