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Dear Teachers,

1. I really don't know why tonight I talk to you, I don't feel sleepy at all. Although I have been sleepless for a couples of days.

- Is this natural to say?

Thanks very much to Teachers,

Stevenukd.
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I prefer "... why I am talking to you ..."
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Another possibility:

I really don't know why tonight while talking to you, I don't feel sleepy at all, although I have been sleepless for a couple of days.
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Comments  
A speaker comfortable with English sentence order would probably say, "I don't know why I talk to you tonight. I don't feel sleepy at all, although I have been without sleep for a couple of days."
 BarbaraPA's reply was promoted to an answer.
 Marius Hancu's reply was promoted to an answer.
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