How do I not go mute when anxious?

Need advice and also to vent. So started 2024 with ton of motivation and wanted to become all better. Was okayish till now. Now I'm back to where I was. Exhausted with just living. Just want to sleep in forever amd constantly on my phone. All this I can handle. What I can't handle is constant anxiety in college (or pretty much anywhere outside home). It's like my brain completely dumbs down and has no thoughts. It becomes even worse during presentations and vivas. Even stuff I've prepared I can't recall. And the moment I come out of that situation, I suddenly remember that information again. What's even embarrassing is that I literally forget to speak?! Like I know how to speak, but I lose the ability to? Idk how to explain, but my communication becomes limited to nods and shrugs and if I did talk, no one can hear it, that's how quiet it gets. (I am pretty loud at home). I start feeling subhuman somehow. And despite knowing this is probably anxiety, I feel like I'm faking it for attention of others or something. I feel like others are annoyed with me amd want me to stop it already but I'm not doing it on purpose. Then I start thinking what if it's not anxiety amd there's something actually seriously wrong with me. Then it spirals and I start thinking I'm going to die of brain tumor or something (stupid, I know). Then I feel like me thinking this is dramatic and so I'm faking it. And on and on it goes. It's even worse in college, which is more embarassing cause of the going effectively mute thing and more concerning because I spiral into worrying about my future. Has anyone experienced this? Any advice? How do I not go mute? How do I not feel subhuman? How do I not forget stuff? Please help.