thank you for your query.
it seems you have developed sinusitis
along with cold and flu.hence i would advise you to start anti-biotics and also paracetamol
with anti-histamines or pseudo-ephedrine
take regular steam inhalations.this will reduce the headaches
.also don't take cold food items for a while.
take lots of fluids and rest.
your symptoms should subside in a week or so with the above tips.
wishing you good health