Hey, Shannon!
Welcome to Susan's! Your feelings of stress reduction and less suicidal feelings are quite normal.
I think we've had that to one extent or another. It's probably a little early for the spiro to have a direct impact on your thinking or feelings. It's probably has more to do with the fact that you are taking a positive step in your life to become your true self.
As you continue through HRT, you will probably find that these feelings of calm and serenity becoming much stronger. There is some debate on whether or not these are actual changes in the brain or just the activity of making these positive steps. I, for one, feel that they are actual changes based on my own experiences.
-Sandy