Not what I want for Christmas

Has anyone else had this lasts-for-ever cold? Is there anything that makes it go away? Mine was gathering strength on Wednesday morning and is still with me, worse than ever. (Aches, fatigue, gasping for breath if air's too warm, nose / throat / chest pain if air's too cold, extremely narrow zone between the two ...) Fresh air has not helped, nor has Tesco Max Strength Cold and Flu Remedy: curiously, the mulled wine I had yesterday did not make things worse.

Terracotta Warriors at the BM tomorrow. Shall try not to sneeze all over 'em.