Clawing out of Depression's Grip

Not long ago, depression had me in its insidious grip, squeezing every shred of self confidence with which I manage to shroud myself. Clawing and writhing my way out of its clutches leaves me first pondering how I found myself there in the first place, and then tending to the wounds it inflicted. These wounds, some of them merely scratches that will heal quickly; others deeper with darkening bruises, which will turn to sickening green (how I feel about them, and sometimes me), and then fade completely.

With the significant changes I've made in my diet and the increase in exercise, I definitely experience fewer depressive states. When I do have them, it seems that they are still intense and I still feel anxious, but I think that the anxiety is a result of the tachycardia I experience during the luteal phase of my cycle, which is also when I tend to succumb to depression.

After my hysterectomy in another couple of weeks, I won't have ovaries, ergo, no luteal phase. So, might it be possible that without the surge of progesterone and testosterone, I will no longer experience tachycardia? Without the tachycardia, will I no longer have that feeling of anxiety? I don't think that my depression will be eliminated completely, but wouldn't it be lovely if it were simply a shadow skittering across my mental landscape rather than the monster I described above?