Caffiene free tea, teaspoon of honey and a lemon slice in it! For the coughing try sucking on some candy's or a fruit pop.
Hope you feel better!
What it help me alot was eating raw honey and lemon, one spoon in the morning, afternoon and before going to bed, it might sound old fashioned but it really works, and ever since i did it constantly i haveny gotten sick in months, cus i was getting sick very often