If it came on you vrey quickly and it sounds as if it did, it might well be influenza in which case you can probably forget your vacation.
Influenza almost always has fever, chills, headache, body aches and sometime sore throat.
Sore throat, fever and chills with little or no cough is more likely Strep Throat.
Cough, stuffy nose, etc = cold
cough, chest congestion, fever and chills, bodaches, etc = typically influenza
Bronchitis can have a lot of chest congestion and cough, not so much fever and chills.
Influenza can respond to antiviral meds such as relenza, tamiflu, rimantidine(not so much)
It is ESSENTIAL that those be started as early as possible if they are going tobe beneficial. they do not work the same way as antibioitcs.
So if there is any chance you have influenza and want treatment---go NOW.
Cough syrup also.
Influenza doesn't respond much to over the counter meds.
Get well soon.