My physical sex is male. I was born with that pesky Y chromosome, and it cannot be changed.
I believe that my gender falls closer to the female end of the gender spectrum than the male end. It seems to me that my mind has always given me my sense of gender.
Now for the spirit. After years of thought on this, I think that our spirit is without gender. We are each unique beings with a spirit that inhabits a body with unique physical and mental attributes.
I would go into more detail on how I came to that thinking, but it probably gets into forbidden territory for this site.