I accidentally breathed in some dust on our carpet, then the next day I started shivering, had a temperature and had a dry, infrequent, unproductive cough. I have the worst headache I have ever had. It hurts when I cough and my head feels sore and sensitive when I lightly rub over it with my hand. It feels like flu symptoms but with only a tiny amount of phlegm. I've been taking paracetamol for 3 days straight and my symptoms are not improving. Please help