Both are correct, but the first is more wordy.
Which sentence is better depends upon the context.
Without more information, # 2 is better.
Choose the sentence that is written and punctuated correctly.
1. She reported she was in the women's dressing room when she suffered what felt like a terrible chest cramp.
2. While she was in the womens' dressing room, she suffered what felt like a terrible chest cramp.
Answer:
#2. It just sounds better - not sure of the 'English Rules' why.
2 answers
Please check the word womens' in #2. That is incorrect.