I randomly started stuttering and I don't know why?

I randomly started stuttering and I don't know why? I'm not sure if this is where this is meant to go, but I was hoping someone could give me some help. I just turned 22 and I've never had speech problems before. I don't take any medications, I'm not stressed, it's not social anxiety, my thoughts aren't moving faster than my mouth, I don't speak too fast or anything like that. About January or February I noticed I had begun stuttering and slurring my words, to the point where they're sometimes completely unidentifiable. At the time I assumed it was nerves, being a new semester and surrounded by new people, and I didn't give it any thought despite the fact it had never happened before. Since then it's only gotten worse, and now every time I speak I stumble, stutter or end up slurring as I struggle to move my tongue correctly or something, and sometimes I have to speak slowly with weird spaces between my words to get them out at all. It's so noticeable its even become a little joke among my friends and sisters, but it only getting worse has me concerned. It's begun happening every single day, in every single conversation without fail. I won't even be thinking of it, really focused on the conversation at hand, when out of nowhere I just start repeating one single syllable, rapid fire, unable to stop or move on to the rest of the word, and I have to physically close my mouth, take a breath and wait three or five seconds before finishing my sentence. The longer my sentences are, even when I don't stutter, the more slurred it gets, every time. It's like I can't help it. I can't control when it happens, it happens even on the word "the," and no matter how hard I try I can't continue speaking like it didn't happen. I HAVE to physically close my mouth or bite my tongue to stop it, if I try to keep speaking I sound like a broken record. I don't know if I should be concerned about this. I don't claim to have a stutter or anything like that, as I know it's a real thing many people have their entire lives, but I don't know what else to describe it as. It just... started happening at the beginning of this year, assumably, and I have no history whatsoever of speech problems. No matter how much my friends and family joke or laugh about it, I don't think it's funny. I have literally no control over it. It's been about seven or eight months since this began, and that's assuming I didn't just start noticing it then. Should I be concerned or will this probably go away on its own in time?