People stop talking just to listen to me, which makes me feel pressured to finish my sentence quickly

People stop talking just to listen to me, which makes me feel pressured to finish my sentence quickly It's supposed to be a good thing, right? The class is usually busy in themselves during lectures, but when I try to speak, there's suddenly pin-drop silence. Now I feel like it's on me to say something valuable. I can't just talk nonsense or say dumb things like others do because it would feel like I'm wasting everyone's time. I’m even afraid of casual conversations because of it. So, I’m just asking—have you ever faced this before? What's the right way to get through this phase? Or am I just overthinking?