The second way to know if you are ovulating is to pay attention to the different symptoms you experience. Be careful as these are only an indication! An isolated symptom does not necessarily mean ovulation, so it is better to look for a set of concordant symptoms. Possible signs of ovulation include:
Sensitivity in the upper body
Increased libido
A feeling of heaviness in the stomach, bloating or even abdominal cramps
A slight rise in temperature, especially in the morning
Changes in discharge or saliva
Keep in mind, however, that sometimes there are no particular symptoms. So take this non-exhaustive list with a grain of salt and as an additional tool. Keep in mind that it is by combining all the methods that you will be able to determine the exact moment of your ovulation.