Does anyone know what this sickness is??? :(?

It's either a cold or seasonal allergies. If your mucus is clear, then it's allergies and you need to take an antihistamine, such as Zyrtec or Claritin, each morning. If your mucus is yellow or green, then you have either a cold or sinus infection, and you need to take pseudophedrine, commonly called Sudafed, every 4-6 hours, or, if you haven't gotten better within a week, go to a doctor because you need a prescription.