You may feel sleepy and tired after having sex during ovulation. This is because sex causes the body to release a large amount of hormones, including adrenaline and dopamine. These chemicals promote the body's release of energy and increase alertness and concentration. However, this reaction can also vary from person to person, with some people feeling more relaxed and happy, while others may feel more excited and nervous.

First, you can try to take a break after sex to allow your body to fully rest and recover. You can try some easy stretches to relieve muscle fatigue and tension. In addition, you can also choose to sleep for more hours to ensure that your body is fully rested and restored.

Secondly, you can try to do some aerobic exercise before sex to improve your body's health and reduce physical fatigue and tension during sex. In addition, you can also choose to use some sex toys or lubricants to improve the quality and satisfaction of your sex life and reduce fatigue and discomfort.

Finally, if you experience ongoing fatigue and discomfort that affects your daily life, you may want to consult a doctor or sexual health specialist for more professional advice and treatment.