Thanks for the information.
First - if you are concerned, you should go to the hospital. There is no harm in going, particularly if you have health insurance. If you go to the ER, you will be thoroughly examined and ideally a diagnosis will be made.
Second - most likely what you are experiencing is due to your weight. This isn't bad news, per se, because weight is something that you can do about. You may be suffering from Pickwickian syndrome. For more information, click the following link.
http://www.healthatoz.com/healthatoz/Atoz/ency/pickwickian_syndrome.jsp
If you have additional questions, feel free to ask!
Sincerely,
Emily
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