Can you change what your character looks like in oblivion

I love Oblivion. My Argonian female, Sei-laa, I made just because I think that argonians are hot. By the time I got to level 27, and I wanted to be able to identify with my character more, so I started checking around to see if I could change my character. Alass, I could not.

There is no way to change your character once you leave the sewers.

Sadly, my console crashed, and I lost all of my data... at least I can build a character that suits me better this time.