Stuttering/stammering is its own thing. No consensus indicates otherwise. Of course, you should probably get the other things you mention checked out, just to see if something separate might be going on. But you're going to have to rely on the professionals - we're not meant to self-diagnose, because we don't have the proper education for that. We're also not meant to self-medicate. That's too dangerous. You mention "doctors". Which are these? Generalists? Specialists? Therapists? _Speech_ therapists?