I've had a cold for over a week now and it's wiped me out!

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I have had a cold for over a week. I've never had one last this long before! Everytime I go to bed I think I'll feel much better tomorrow, but I wake up and although the stuffy nose or cough feels mildly like it's getting better, I just feel completely wiped out! With a constant headache and blocked nose :/

Any tips on rushing the process up and feeling more energised?

I've done nothing yet for christmas prep as I just cba! I've ended up in bed at 7pm with the kids for the past 5 nights!