I've ramped up my practice time and so have taken opportunity to play publicly 3 times in the last several weeks, most recently at a memorial service this last Saturday.
Saturday I was playing a pretty easy song with a very good piano accompaniment, and everything was working perfectly - air, embouchure, tongue, flexibility. Felt as comfortable as I've ever felt playing a trumpet. However, during the last part of the song, I suddenly started feeling nervous, and I swear that my trumpet got shake-voice. I always feel a bit nervous when I first get up in front of a lot of people but I usually get over it once I start playing, and any gaffs are more likely to be on the front end than the back end. This time it was like I was softly flutter tonguing the entire second verse, or at least that's what it seemed like to me. In my head it sounded like a soft vibrato that was completely unintentional that I couldn't control, but I know that these things can seem very obvious to the performer while going practically unnoticed in the audience.
Several people told me afterwards that it sounded great, including a professional trumpet player that was present. However, I'd known the guy for all of 2 hours at that point, so I really wouldn't have expected him to say much anything else to a relative stranger at a memorial service.
I later asked both my sisters, both of whom were present, both of whom are pretty musical people, and both of whom tend to be very, very (brutally, truncated even) honest with their brother. They said they didn't notice. Thought it sounded great.
What are other people's experiences with this type of thing?
Is it likely more in my head than it was in the actual sound?
If it happens again, is there anything I can or should do in real-time to fix it?