I dont think I ovulate after depo!! Grrrr.?

This is my 17th cycle after being off depo... I finally decided to track my BBT to see if I even ovulate! So, to make a long story short I dont think I ovulate.. I got a positive OPK several days ago but by the looks of my temps I think the OPK lied :(.... My cycles are usually around 40-42 days. do you still think there is a chance I might ovulate but just late? a href="http://www.fertilityfriend.com/home/1f1b7a" rel="nofollow"http://www.fertilityfriend.com/home/1f1b…/a