BBT spike?

Amber • 7/1/09 miscarriage (8w2d), 5/31/10 my son was born, 5/26/15 chemical, 6/24/15 chemical.
So does this mean this is the start of my ovulation? The small spike over the weekend was because I didn't get up still 11 (my boys let me sleep in, woohoo!) According to my green days, yesterday and today are my most fertile.