I just started stuttering and have trouble telling stories

I just started stuttering and have trouble telling stories Let me preface this with the fact I **didn't** stutter as a child, and am now 19. It has really started bothering me these past couple weeks. I don't draw out syllables, or have trouble transitioning between words, sometimes I just want to say something and nothing comes out. This has never happened to me before, I have had plenty of interviews, spoken publicly several times without any 'interruptions'. I don't know if one can develop a stutter later in life, is this something I'm going to have to deal with? I've told no one about this and I honestly doubt anyone has noticed. More than anything it rattles my confidence, and I feel as if the more I'm thinking about it the worse it gets. Potentially key info: I have a very hard time sleeping, I only notice it when i'm tired, and after I exercise (I play soccer or weightlift daily). I just moved this year and this is my first time ever moving. When I'm confident, or doing something i'm good at, I don't notice it. Also my I think I screwed up my jaw, it clicks when I open it too wide, noticed it around the same time my stuttering picked up. Could it be psychological? Or physiological? I just need some guidance, people. Edit: Is there any amount of stuttering that is regular? Or are there terribly varying degrees to this speech impediment? Someone inform me, I know nothing about this topic.