Can’t get the words out

Can’t get the words out My stutter has gotten a lot better over the last couple years but I noticed recently that whenever someone asks me something like my name, what I want to order, etc I open my mouth to speak and just can’t get the words out. I end up sitting there gaping like a fish looking like an idiot then finally 5 seconds later I answer them. Does this happen to anyone else and does anyone got any tips to help me with this?