Hello I hope that I will be able to provide some information to help you.
First off I must emphasize that the information I provide is an educated guess and that only an actual examination will able to provide an accurate diagnosis. The allergies that you complain of may be a sinus infection or a congested sinus. The sinus can affect the inner ear causing a loss of balance or the fainting feeling. They would also explain the ringing or fullness in your ears. If you have a sinus infection it may have upper respiratory involvement. This could be the chest discomfort you are feeling. Obviously if you have shortness of breath or coughing this would confirm this but this does not always happen. If it is what I believe it is then simple antibiotics may be all you need. ThebootXXXXX XXXXXne is that if you have increased chest pain significant shortness of breath of the feeling of impending doom then do not wait go to the hospital because there may be a cardiac issue.
I hope that my answer was helpful.
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