wow. that can be quite embarassing and frustrating. going in for help to a place that's suppose to help and you get laughed at. ignorance on their behalf.
well, i wasn't there to see what you passsed, however whatever it was it's out of your body. sometimes you may never know what it is but as long as its out of you and you feel better that's what counts.
as far as doctors, labs, ultrasounds...im a skeptic! i wouldn't know what to tell you. others here may point you to a good lab.
except keep on cleansing and don't get discouraged. im passing things that i haven't identified, but i feel good about getting rid of it!