"Do you have anxiety because you stutter, or do you stutter because you have anxiety?" I get asked a lot...

"Do you have anxiety because you stutter, or do you stutter because you have anxiety?" I get asked a lot... ... and I just don't even know. What came first, the chicken or the egg? I was diagnosed with severe social anxiety at 16, but I just don't remember that being the case when I was younger, even though I still stuttered. Maybe they're just feeding each other in a vicious circle, this late in life (I'm 29, f). What about you? How would you answer that, if asked?