I am a 20 year old female. Two nights ago I had a terrible chest cough, that had no sputum. I woke up the next morning with a fever of 102.6 and have been taking tylenol religiously. I did not eat at all yesterday, but I drank about 3 liters of water and nyquil before bed. Today I continued to have a fever, I had diarrhea this morning, and this evening I had flaky loose diarrhea that was green in colour. I tried to eat some bread after that and I've been vomiting violently ever since. I assume this is just a flu, but I am a bit worried.