Should I be worried?

If you think that worrying will make you more healthy, then by all means worry away.

I’ve never found it to help a great deal, though. If it sharpens your focus in some way to take precautions that you would otherwise ignore – and if they seem wise in your cold, analytical view – then in that narrow sense worry might be indicated, and helpful. But again, if you’re a sentient adult who normally makes rational decisions (or if you believe that you do in all honesty, because sometimes rationality itself can be spoofed, and as Feynman says “first you must stop trying to fool people, and you’re the easiest one of all to fool”), then you probably won’t get a lot of benefit from worry, and it can detract a great deal from living in the moment (or paradoxically, prevent you from making plans for the future which may involve “acceptable risk” – worry can turn your considerations of “acceptable risk” into “certain calamity”, and dampen your enthusiasm for living a more enjoyable life).

So my advice is to not worry, and to be happy instead. I think a wise man once said that, but I can’t be certain.

In any case, if the lab results indicated a higher-than-normal white blood cell count, as the nurse indicates, then they simply want to get a better baseline reading when you’re feeling up to par. You may still be infected with a deadly disease (I don’t want to sugar-coat this, after all), but at least it will be a better baseline reading.

And I’m sure that I’m kidding about the deadly disease. They just want a baseline from “the normal you” with no transient illness or upset condition.

I would call back and ask what your white count number is and what did that indicate. Two weeks is a very long time to worry and to imagine the worse. Ask if you can come in sooner to have another blood test. Good luck and I really hope it’s nothing. Please let us know.

Taake comfort in two factors:
1. If it was a truly worrisome count, the Doctor would have called, not a nurse.
2. They told you to come back in two weeks, not tomorrow.

As @zenvelo If it was something super serious, you would have been called in earlier. Plus, if you were getting asked if you were sick lately, they probably just want you to come back when you are healthy because the white blood cell count interfered with the testing like what @CWOTUS said. I’m sure it’s nothing to worry about. They just want accurate testing :)

I agree with @zenvelo. If it was serious, they would have wanted you back immediately. It sounds like the results support the idea you have been fighting off a cold and they just want to close the loop when you are better.

You’ve already been called back in so no point in worrying. I’m sure if it was something concerning you would’ve been told already or asked to come in much sooner.

No, need to worry yet. Wait until the results from the second test.

If it was urgent they’d bring you back ASAP not in a casual “couple weeks.”
They just want to see if your body fought the infection itself.

I agree there is no point in worrying about it. Just wait for the result of the second test. While having a higher than normal white blood cell count is something to take note of, it could be that your immune system is putting up a fight against an infection. If I have a throat infection, my white blood cell count goes much higher too.
Just wait and see but don’t panic at all. I hope you feel better very soon, take good care of yourself and let us know how you get on :) xxx