Yikes, DR Jane, I'm glad you're OK! When my book group was here last week one of the ladies had that happen with an almond. I almost had to call Paramedic Rob, but she was able to cough it up.
I have choked many, many times in my life. This was the first time I was scared. Chewing soft bread will usually push whatever is lodge in there down, howver, this time I feared bread would also get stuck. I also didn't think I had enough time to thaw a bit of bread.
I was making god awful noises alternating between trying to get it up and getting air down me. It finally disolved and went down.