Can pelvic floor dysfunction, aka pfd, and vaginismus ever be considered the same thing? one dr. said i had vaginismus, a subsequent dr said i had pfd

Yes: Both "pelvic floor disorder" & vaginismus are arbitrary terms that refer to symptom patterns & speculative theories for cause of symptoms. They do not incorporate definitive known causes. In my experience the most fruitful search for causation regards musculoskeletal functions of pelvic girdle and presence or absence of a genetic variant called Joint Hypermobility Disorder. See Brighton Criteria.