Hi, I became poorly Monday evening with chills, then came fever, my body aches, I m struggling to get any sleep, even though I ve spent the last 3 days in bed. I have runny nose and a bit of a chesty cough, I now have a stiff neck and a headache. I have no appetite, I m just fed up with it. I m taking paracetamol with a decongestant in. Can I take codeine? Will it help with the constant aches?