This changeable weather does us no good at all!!
We have claggy freezing fog and sub-zero temperatures....but then it IS Winter.
Have you tried Eucalyptus steam inhalations, Lillybit? They make your eyes run...but they do wonders for a 'sticky' throat and sinuses.
Poor Serinde, honey and lemon for your throat to soothe and perhaps a thyme gargle. If you have some thyme in your garden, try infusing it in boiling water for a good 15mins, strain it and add some honey...it tastes disgusting otherwise
.... then gargle with the warm liquid
Thyme is an antiseptic and is great for throats.