Where are you located? What's your height and weight.
Can happen owing to the weather in the winter in northen India to certain individuals.
Still...
Stop playing badminton for now, instead devote that time towards walks.
Decrease sweets and carbs in your lunch as much as you can.
Don't take tea or coffee post noon till 5pm
Start doing breathing exercises in the morning.
Try monitoring your pulse rate as well as blood pressure for a few days.
