@lfrum
In classes I've often been reminded that discomfort is good, but pain is bad.
Perhaps you pushed too far too fast into something you were not ready for?
It is a common misconception that yoga is all gentle stretching and bending, but not real exercise.
I hope you didn't injure yourself, but you should feel like you have worked very hard.
@lfrum
Ouch! Injuries can set your training back weeks or months. I know because I've done it myself several times :)