I just had a conversation with someone for 5 minutes and I didn't stutter!

I just had a conversation with someone for 5 minutes and I didn't stutter! I absolutely don't know how this happened. She is taller than me and that makes it more confusing because people taller than me make me uncomfortable and I stutter really bad when I'm uncomfortable. I just finished from the gym when the conversation started. Could it be because I was at the gym minutes before? Or was I just lucky? I'm not fit but also not out of shape either and I go to the gym when I feel down or need something to boost my confidence. Maybe it worked?