Yes definitely. I think this is very common among pws. Usually they have problems saying their name, specifically the first phonetic sound of their name. And they subsequently have problems saying other words starting with the first letter of their name. It looks like you have problems with saying mostly plosives sounds. Sounds where you have to momentarily stop the flow of air in order to say them. I have the same problem sounds with the addition of others like S, T, V etc.