Wow, I kind of get what you mean. This is exactly what happens to me. I'm going to try this. Last night I was trying to say "brewery", because I was talking about different bands that play at several breweries across the state. I knew that I had to say the word multiple times, and I anticipated trouble each time it was going to come up. The times where I said it successfully was when I dismissed the "Br" as being the unimportant part, and "ewery" is the only part that actually is vocalized. When I think about it, it is impossible to vocalize "Br". It's only an articulation that's used for clarity. I think I get into trouble when I try to vocalize the "Br". As a musician who plays brass instruments, this makes sense to me. To articulate notes I use the tongue, and the purpose of that is to give each individual note definition, At the moment of the articulation, there is no sound coming out of the instrument because the tongue stops the air. In the case of speaking, when the lips come together, there is no ability to vocalize hard consonants - sound can only be created when the lips come apart. This is why I never have trouble with the soft consonants such as M and N. It's only the hard consonants such as B, P, K, T, etc. So I'll try to be mindful of this during my speaking in the future.