A redo of my exercise "regimen"

I didn't do any exercise today.  I exercise five days a well.  Well, at least that is what I am supposed to do.  I don't exercise on Sundays and Tuesdays.  Now I wonder if I should change all that.  I like to walk but I realize that I don't do enough.  I have no excuses for not walking.  My desire is to lose weight and keep it off.  I have been a great procrastinator but I would like to stop procrastinating.  I feel like I am sabotaging myself, but am I?  I wonder.