I am not sure if I actually stutter

I am not sure if I actually stutter I am told and also kinda remember that as a kid I had a described "robotic" speech, kind of slow and monotone. also I've heard that I was a little late to start talking. but these things all cleared away when I grew up, once older my family or friends described these as a thing of my childhood, no one and myself included thought my speech was out of ordinary. years later I went to university, language teaching and after graduation immediately (few months back) started working as a teacher and only now that my job is literally talking I was confronted by one of my coworkers and also recently found friends "hey did you have problem speaking as a child?" I was dumbfounded and I brushed it away denying it and all that not to mention I got tested for being hired as a teacher but then I became self-conscious of my speech, I don't remember before my university life clearly on this topic and I think it wasn't the case, but thinking back on my days in dorms I begin to notice hey maybe I did have abnormal speech and maybe my friends were either too kind, or afraid to point it out plus it shouldn't have been too capital but I can nitpick exact moments that I stammered. most often obvious when I audio record to send a message for someone, listening it back myself. I don't get stuck on a single word, it is usually like I burst a number of words very fast and then a pause happens which most of the time I am oblivious to but it is glaring when I listen to my own audio recordings. so all that said and looking it online with cases online being usually extreme cases of people I end up being confused whether I actually stammer or not, maybe in the past it wouldn't have been important to me but now it is, I am a teacher I do need my speech to be fluent. p.s.: I also teach history (a favorite subject of mine) and funny enough I either don't or am having too much fun speaking about history to notice any abnormality in my speech, same thing I can't be sure in my language classes. worst part is that I am just not sure whether in my students eyes I am talking normally or not