Well, you see, that's the thing - stutter can vary. A lot. Sounds to me like you stutter not very often. I guess it might be even harder to get used to the variance then, because of the low frequency. But yeah, that's stutter. Perhaps you should work with a speech therapist to see if you can manage those situations you describe better? You describe changing sentences - this is a common tactic, but it's not necessarily the best for you in the long run. When you avoid stuttering, you might miss out on an opportunity to get more comfortable with the stuttering events.