Strep B Culture exam

I had blood test and my strep B culture exam last visit and I felt like I'm a guinea pig. A senior nurse was supervising the nurse who was doing the blood test! when the more experienced nurse asked her if she did a strep culture before the younger one said not yet so the senior nurse said to her I'll show you how it's done! (they were discussing it as if I'm not in the room or I could not perfectly understand them! Maybe because I'm Asian). The senior nurse left for a while while the younger one took at least 2 vials of blood for the blood test. After a while the senior one returned and demonstrated while the younger one looked on. The situation is done and over in seconds but awkward enough already without a third person looking on but what can I do? I definitely am looking for another clinic for my next pregnancy!