Ovulating?? Help!

Glow says my fertile week started the 28-jan 2nd (today), if I had a significant spike in temperature does that mean my body is going to ovulate today?? I have been bd all week and even bd very early this morning. What do you believe is the chances of me ovulating today and getting pregnant?? I know it's alot to ask but I have had 4 pregnancies and only 1 birth which I am grateful for. Please any answers you may have will help.