what you're describing about blocks appearing suddenly makes a lot of sense actually. Adolescence is a huge time for speech pattern changes, and it's super common for the type of stuttering to shift during puberty. Your brain is going through rewiring and hormonal stuff that can absolutely affect motor planning for speech. the fact that you're fluent under pressure but block in relaxed settings is interesting too. That's not uncommon, it's often about anticipation and control. When you're performing in front of the class, you might be in a different mental mode that bypasses whatever's triggering the blocks at home. I went down a rabbit hole on this a while back because I was curious about how stuttering evolves. From what I understand, working with a speech therapist who specializes in adolescent and adult stuttering could really help you figure out if these blocks are motor-based, anxiety-driven, or something else. Better Speech is an online platform I came across that connects people with licensed SLPs who actually specialize in stuttering, and they're apparently good with tailoring therapy to your specific type of disfluency. Might be worth checking out since waitlists for local therapists can be brutal. other things that came up were self-therapy programs like the McGuire Programme or apps like Stamurai, but tbh working with someone who can assess your specific situation seems like the better route given how much your stutter has changed over teh years.