On Monday , I had this slight discomfort in me and since I was not in a good mood , I used it as an excuse to take a half day leave to rest at home . When I was back on Tuesday , I felt worst . Terrible backache , cough and sore throat but still managed to pull through . Today , when I work up , I had this dreadful feeling towards working and as well as this same sore all over my body .

What may have happened before Tuesday ?
I took some time off to rest .