Missing Time/Time Skips?

Yesterday I had two instances when the people around me heard me say something but I had absolutely no recollection of saying anything. I would ask when did I say that and they would reply that I said it just moments before. I'm really concerned with this. Is it my mental health? Why can't I remember saying things that people said I said? To me, everything looks fine but I could possibly compare it to me missing pieces of time that occurred. Can someone please explain to me what's going on?