OP. We are back to being ridiculous now. Get a grip. There is no cancer. They have checked. Liver or Pancreatic cancer is blindingly obvious in even the most basic blood tests.
Pale stools are normal when your body is a nervous wreck! Too much adrenaline, too much cortisol, body in overdrive will dump everything. That's why when you are nervous about something you often need to pee every 5 minutes.
Dumping everything means that food is not staying in the gut long enough to be fully digested. Especially if you have digestive trouble already. Hence yellow poo.
I always know when I get the shits whether it's a bug or anxiety related. Anxious shits are more yellowy and have a distinctly foul smell to them.
Stress will always exacerbate any digestive troubles. The stomach is ALWAYS the first to go.
You NEED to lower your anxiety levels before you do yourself serious damage. Go for a massage and STOP thinking of everything as a symptom.
Do a bit of CBT here. We want What, Why, Hard Evidence For, Hard Evidence Against, Reasonable Conclusion.
Get a sheet of paper, divide it into 5 columns and in the first write out exactly what you are afraid of. Then in the second column write Why you think that. In the third column write down what hard evidence you have that it is cancer. And by hard evidence I mean test results, supporting evidence not just your feelings. We with anxiety cannot trust our feelings, our minds are not to be trusted.
Fourth column is what evidence you have that is ISN'T cancer. So you have a clear blood test, possible coeliac or intolerance, raging stress levels that would account for the lighter stool. New meds etc
Then in the fifth one you tot up the evidence in columns 3 and 4 and you write the likelihood of it being what you fear. So you have say 2 things that might indicate cancer (you don't, that's just an example) and 6 that you don't. The evidence points to you not having cancer.
It's hard to accept the fact that what is wrong with you is psychological. I've been on the same journey. But you cannot trust what your mind tells you, your mind is a nervous wreck.
Think back OP when did this start? This thinking that every niggle is a major illness? What is at the root of it? Were you ever seriously ill as a child? Someone close to you? Something must have triggered this to start with, maybe something that you don't even realise affected you. Think hard. What was the first thing? Ever?
Hell all of this could be a distraction technique that you don't even know you're employing. Actually thinking about it that's pretty likely. You really resist thinking about the anxiety or treating it. Any time we attempt to get you to start getting proper help, you come up with some new disease you're positive you have. Time to push it aside and look at what you're avoiding. Really look at it. Don't you want a life free of this?