Your symptoms sound really serious. I recommend that you head to the nearest doctor or clinic - do they have walk in clinics where you are? - especially if you're afraid to fly home. We're not equipped to diagnose your condition and it could be something serious that needs immediate medical attention. On the other hand it may be something as simple as an ear infection or migraine which a doctor can give you some medication to clear it up right away. I believe it's never a good idea to let a sudden change in symptoms that persist go unchecked.
The secret of health for both mind and body is not to mourn for the past, not to worry about the future, or not to anticipate troubles, but to live in the present moment wisely and earnestly. Buddha