Hi, I don't know why but I stutter a lot while talking

Hi, I don't know why but I stutter a lot while talking So, I am a person who loves to talk, I mean I find ways to talk to someone but I have been facing an issue recently, thought I'd post on reddit. Whenever I'm talking to someone, whether they are my friends, friends or coworkers, I stutter while talking and my mind goes blank, I don't know why but I stutter a lot like it's honestly weird when you're talking to somebody calmly and boom... You stutter for 10 seconds or so. I am currently a person who studies and does a part time job at same time, so yeah I have to talk to lots of people in a single day. Of course people notice that a lot but don't say that to face because that would be rude or disrespectful. Also as a follow up, I'm not an introvert nor do I have any social anxiety issues. I do not know honestly what's happening. Any advices would be highly encourage to fix this issues :)