I have a kid with a stutter and had the same concern about "making it a thing" by taking her to a speech therapist. The therapist we had for evaluation was excellent and treated kid with respect and enthusiasm and made it fun for them. My mind was put instantly at ease. We pitched it to kid as seeing someone nice who would give them a few techniques to help speak smoothly when they get excited so that was OK too. So far so good but I know just how you feel.