Thank you for stating your concern
From the description you might be catching a cold or flu, since you where exposed to a change in temperature, general weakness and mild symptoms like
headaches and
dizziness are common and also the
fever, since you don't have access to medication yet and symptoms are just starting to develop, you can help your immune system by resting, lots of
vitamin c, hot beverages and protecting yourself from cold air currents if you can start taking
advil, but if the symptoms persist or new ones appear, tell your parents and if needed schedule a visit to your doctor.
Feel free to ask if you have any more questions
Best Regards
Dr. Aguilera