Hi...started shivering last night and went to bed with a temp and headache. Took disprin. Woke up this morning with a massive headache and aches and pains. Temp has dropped. Took disprin and magnesium powder for aches. Feel very dehydrated so drinking lots of water. Not hungry. Please could you give me an idea of what is wrong. Also would I be contagious? Many thanks Carole