I would. In my experience teachers have been very understanding of it, even offering to allow me to give presentations to just them. If you have an IEP (in The is) that can bolster your claim if there is any doubt which I hope there isn’t because they should be able to hear your stutter as you said - twice in a sentence is normal. You’ve got this! Remember to breathe and there is no shame is forcing yourself to draw words out of it helps or talk slower if it helps. These are your classmates and friends hopefully.