Does anyone else only stutter under very specific circumstances?

Does anyone else only stutter under very specific circumstances? When I was younger, I had a noticeable stutter--I'd stutter a couple of times in a sentence--and a severe speech impediment, to the point where people couldn't understand what I was saying at all. After a decent amount of childhood speech therapy where I basically repeated words over and over and over again and was corrected on the sounds I made, I've almost eliminated my actual stutter. My speech impediment (basically mispronunciations of a lot of sounds) is still here and noticeable, but people can easily understand what I say. I've been told my impediment sounds like an English or Australian accent now. Anyway, like I said, stutter almost entirely eliminated. But under a couple of specific circumstances, I do stutter. First, if I get cold enough that I'm shivering I'll stutter. Not only when I'm actually cold like most people do, but after I'm inside and totally warmed up again my stutter will be back in full force for maybe half an hour. The other situation I stutter in, is when I'm with someone I don't know well or feel uncomfortable with. If I'm in a highly stressful situation where I'm around people I'm afraid of, my stutter will be really severe. Once it was even so bad I couldn't seem to speak at all. I'm not sure if this is a common thing among stutterers? Aside from that, I'll occasionally stutter for a word or two, but it's uncommon except on excessively long and difficult words. I stutter that often even when I'm alone. So, anyone else stutter after getting cold, or stutter severely (even to the point of almost or entirely losing your ability to speak?) around people you're scared of?