@Vitko - that is your creatinine which is usually a test doctors use with other blood work to determine your kidney function. People with more muscle mass, are in contact sports and train hard can also have a higher than normal creatinine number. CK is a subjective number that requires taking in multiple factors with other tests to determine the cause, especially if that high (10,000 plus).
I am sure you know with your size as I recall reading you were over 300 lbs, and lift weights will contribute to a higher number, but so will damage to specific organs. If I recall from the past you had fatty liver, but you said two specialists said not to worry about it which I don't follow. Fatty liver can lead to liver cancer and cirrhosis if not halted or healed.
What did the doctor say when they read your CK being over 10,000 as that is not normal for anyone. Usually this kind of number would indicate Rabdomyolysis and not just muscle damage from training - normally a doctor would consider this a serious concern.
I am not a doctor, so my opinion is not remotely as valuable as a GP or specialist, but I would be demanding further testing.