Do i have the cold or flu? feeling very weak. very runny nose. mild sore throat. mild headache.very mild diarrhea/only sometimes.

Sounds like a cold: Your symptoms sound more like a cold, though neither cold nor flu typically cause diarrhea. With influenza people typically have a high fever, bad sore throat and cough, are achey and basically feel like they were hit by a truck and can't get out of bed. The best treatment for colds is the herb Pellargonium sidoides, sold as Umcka- see http://tinyurl.com/moytw3n For influenza I advise Sambucol.