Hi, I'll try to give some observations and guesses rather than just saying something useless like "go see a doctor". Having some understanding might take away some of the worry.
Does this look like leukemia? No.
Although Raynaud's is vascular in the way it behaves, it's considered to have an immune system cause. That'd explain why you are sent to a rheumy.
Since the hematologist released you, that says they are not worried about some imminent danger shown in your blood tests. But let's speculate anyway and try to logically tie all your tests and symptoms together.
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So now, getting more complicated:
B12 is essential in making red blood cells. So is iron, which relates to ferritin. Vitamin B12 is stored primarily in the liver, and inflammation might cause it to be released.
You're right, the sudden-onset non-dietary high cholesterol really stands out. The liver is very much involved with cholesterol, of course.
You have no tenderness when you press on your liver? Did you have liver function tests, such as ALT and AST?
Next, are UTIs common for you? If not, we'd maybe add the more-than-s-few leukocytes (WBCs) found in your urine into the equation. While WBCs are immune cells that fight infection, if you don't currently have a UTI (or kidney stones), then we'd look at a possible inflammatory cause. Does this look like leukemia? No.
As for the von Willibrand's, do you have a family history or else gene testing for that? There is the rare "acquired" vW, which is non-genetic and has an immune system cause. For our purposes, we can say that immune system = inflammation.
Do you have family history of unusual immune system conditions?
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For diagnosing, it ls usually best to start off by *assuming* that everything has one common cause. That's called Occam's Razor. So in that vein, here's a wild guess: what if you have bleeding from the vW into the liver and kidneys, which in turn causes the other downstream effects.