Blocker here. Try stuttering on purpose. Sometimes it's best to try it first with people you trust. I am convinced I went from stutterer to blocker as a teen because the stereotypical pop culture st-t-t-t-utter was always the one that was pointed out and made fun of. I was doing all that I can to AVOID that, whether it be blocks or filler words. Part of the stuttering on purpose exercise is taking on the avoidance aspect as well.