Suffered a really bad flu/cold type virus a week before Christmas and managed to get better. Then Boxing Day the coke came back for vengeance with a fever/aches/bad chest. I was in bed for 5 days. Then NYE I started feeling better. Fast forward a week I'm still suffering from a uncomfortable cough which is making me gag/sick and permanently got a headache with clearly a sinus infection, bad cough and now I've got a tooth infection. Genuinely don't know how to get better?