I Am a Native Speaker, but I'm Not a Fluent Speaker

Being a fluent speaker of a language native or foreign is a special skill and it's not just about knowing vocabulary and grammar. Fluency requires vocabulary and grammar but vocabulary and grammar alone don't go to cheap fluency. I'm asking you whether your first language usage is smooth and flowing as opposed to slow and halted. Do you speak with ease? Do you pause a lot? And do you use a lot of fillers like um, like you know, well etc.