‘think before you speak’

‘think before you speak’ ever experienced other’s telling you this in order to stop you from stuttering? my mum always does that to me. she knows that i stutter, but she always tells me that if i think before i speak, i will not stutter. but that is NOT THE CASE. In fact i believe that I overthink sometimes what i have to say, and this only makes the stuttering worse. she thinks that my stuttering is due to my lack of confidence and uncertainty when speaking, but when i really want to express my ideas, my brain and throat stops me from delivering what i have to say (blocks). this pisses me of the most, even more than people laughing at me 🤬 anyone have had something similar?