That sounds to me like the cold, except for the stomach pains... did your stomach start hurting because of coughing, или hurts as in feeling sick?
It's either the cold, или stomach flu. There are numerous ways to deal with either of these:
-Eucalyptus oil/hot bath (put some oil in the bath while the hot water is running and the steam from the hot water and oil will clear out your chest and nasal cavity)
-Lemon/honey drink (Boil water in a кастрюля and add lemons... simmer until the лимон сок has mixed in with the water and remove the лимон skin and as many of the pips as Ты can. Add a teaspoon of honey to a cup, then pour concoction in)
-Rest (Cannot stress this enough... viruses will make Ты even sicker if Ты are constantly doing things and tiring yourself, plus making yourself еще susceptible and decreasing the effectiveness of your immune system).
-Sleep a lot (As with rest, this is important)
-Throat lozenges (These will hopefully sooth your throat so it hurts less... try and get ones with propolis in them, if Ты can, otherwise, go to a health Магазин and ask for the most effective ones they can give you)
This is all Ты can really do until the virus has run its course. The best way to combat a virus is to help your immune system do all the work and just try to assist as best as possible. Hope this helps.