I just started swimming really hard and my period has become irregular. What's !

I just started swimming really hard and my period has become irregular. What's wrong with me?

Yes, intense sports like running or swimming that require a lot of the body take nutrients away from your cycle to put them to use in your body. It is normal, but keep track of your weight and make sure you are maintaining a healthy weight. Also, mention that you are training for swimming to your doctor just so they know what's up in case you develop more problems. I would also talk to your doctor to see if they can help you regulate it more.