I used to go for speech therapy as a kid. It did help me in my early teen years, however my parents thought I wasn't putting in enough effort to speak and practice. I used to have pretty fluent speech and great confidence, which has gone over the years. I now fall into a downward spiral everytime an incident like this happens. About the anxiety, I think the anxiety of stuttering and making a fool of myself causes me to sweat excessively, and feel weird everytime I have to speak in public or do something of the sort. For example in University I used to have a hard time giving people my admission number since I used to always get flustered even thinking about it. I think this has caused me to develop some mild sort of anxiety of speaking itself.