BBT chart. Did I ovulate?

Courtney

http://www.fertilityfriend.com/home/4dcf3b/

Here is a link to my chart since I can't get the picture to post.

My Temps go down then up then down again. Based on symptoms I would have thought I ovulated already but I don't see a shift. My past three cycle were 26,28, and 24. In that order. I'm on cycle day 20 and getting upset/frustrated. Any advice?