Hi there - sorry you've got these symptoms I can understand why you're concerned. I think that the chronic tiredness you are experiencing could be any number of things. I've recently had a cancer scare & apart from a colonoscopy which I'm having next week all my results have come back clear. However, I too am extremely tired all the time but it's not cancer. I think quite a lot of it is anxiety (my GP thinks I might be a bit depressed) & that could explain your tiredness too given that you are clearly anxious about your health.

You also say your tonsils are chronically infected and I do know infections can cause a number of very unpleasant symptoms which aren't related to cancer. I had sepsis a few years ago after a very nasty cat bite & I can't begin to tell you just how ill I felt. 

When my GP & doctors who have looked at my test results say I'm ok I believe them. I do think it's important to have a bit of faith in their expertise. Maybe when your tonsils ar removed things will improve I hope so. In the meantime try to look at things more positively if you can & your symptoms might ease up a bit.

Good luck & do post again if you feel you need to.