Anyone else have trouble answering registers

Anyone else have trouble answering registers I'm in late secondary school and a couple of years ago I started stuttering when my name was called on the register. It didn't help that my name was at the end so I had to wait for it. I would normally have a pause before I said here miss, sometimes no pause, sometimes long pause. Apart from that I dont stutter much. Last month it's been great, no bad registers at all, but suddenly a few days ago I started stuttering again out of the blue. I don't want to start getting stressed before every register again. My parents are very supportive and I have a great friend group. Can anyone relate or have any tips?