"Stutter" is just a word to describe a general dysfluency in speech, and there's lots of sub-types with names like repetition or stammering or blocking, etc... It sounds like you may be experiencing what many call "blocking", in having difficulty starting sounds, rather than repeating. Mine are mostly blocks. People's stutters can change over time, so it's not crazy to hear yours has too. If you feel it's significantly impacting your life, talking to a therapist (speech or otherwise) might be a good place to start to get tips on how to better manage either the stutter or the anxiety that comes with it.