That sounds terrifying!
The big thing that jumps to my mind is making sure you’re okay on a day-to-day basis. Are you drinking enough water? (Remember that when you’re active, you need more than the basic recommended amount.) Make sure you have a water bottle with you in class (and refill it before each class). It’s also a good idea to mix up your water with something full of electrolytes, such as coconut water, Pedialyte (which you’ll find in the baby section of a grocery store), or a drink mix.
Also, are you getting enough calories? Really, though, are you? Not what you’ve decided is enough, but how many you actually need? Check out this post (warning for calories and unhealthy eating talk) for help figuring out your daily calorie needs.
If you’re fueling yourself correctly, then we may have a stamina issue. And it can be complicated to figure out what you need since different dance types are different types of cardio when you get right down to it. If you’re doing a style like contemporary, where you tend to be going for a long time without breaks, I’d suggest a half hour (up to an hour) on a rowing machine or elliptical to build long-term endurance. If you’re doing something like ballet, where there are bursts of high-power dancing followed by more gentle dancing or even a complete stop, I’d suggest doing HIIT on a treadmill. HIIT will build your stamina for knock-down, drag-out intense dancing where you have to go from 0 to 60 quickly.
I hope all of this can help you figure stuff out so you never have to feel that way in class again. <3
Edit: people have brought up that this could be an iron deficiency. I have never dealt with an iron deficiency, so it didn’t come to mind. Check with your doctor about possible iron supplements!
Xander Parish and Mariinsky Ballet dancers
Photographed by Olya Ivanova for The Telegraph