When I have to speak a lot, which is mostly at my job, my throat muscles feel tense as well and it’s hard cause I still have to talk but YES and it does feel painful....I’m sure you could look up videos or exercises to help reduce the tension in your throat and also (I have tried it a few times) but you should also do diaphragmattic breathing, I’ve heard it’s a lot easier and reduces muscle tension in your throat muscles when speaking from your diaphragm rather than your throat. Definitely need to do this more often!