Working in the Psych field, I couldnt have said it better myself...Thanks Denuseri!
Moving on though, to the original poster...as a client, you have the right to ask a therapist before making an appointment if they have experience treating people with a similar case. Ask them their personal and professional opinion on BDSM and see what they have to say. BDSM is starting to be viewed as a preference and not a disorder in the psych field and you might have to search to find someone who sees it as a preference, but there are some out there!