BBT jump?

Elizabeth • 26. Married to my best friend. Have 2 amazing sons Nathan (9/8/13) and Oliver (5/27/16) and a little lady Annabel (5/9/18)
I ovulated about 5 or 6 days ago and today my BBT jumped up pretty high. Normally around this time it evens out until AF shows up. Could this be a good sign?