Yours ear, nose and throat are all connected, so your ears can become blocked as part of having a cold or flu. It may pay to try blowing your nose, as sometimes that can help with blocked ears.
Otherwise, it is worth seeing if your pharmacist can recommend something. I am not sure if what you need is the stuff that loosens ear wax, as I don't know if what you have is the same thing.
Do keep taking the decongestants though, as they should help given time.
Roiben x
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