Oh I have a few myself. This one is kind of an ER/Doctor issue because my usual dr I was seeing during my pregnancy saw me while I was in the ER. And this was the only military dr I encountered who was such a flaming chauvinistic idiot, as everyone else was cool and respectful.
When a patient has a condition they've had for all their life, and that patient is nearing their mid-20's, it's a pretty safe bet to figure they have some understanding of how their body works because of it, and are pretty familiar with the blood tests and what they mean. If not in medical terms, at least the general idea. I was diagnosed with hypothyroidism when I was nine months old and by the time my second son was born, I'd had it for almost 24 years. In addition to having my blood drawn once every 6 months or so to test my TSH for those 24 years and having taken some anatomy and physiology courses, I had a pretty good understanding of what it meant when my TSH was low or high.
Soooo...while I'm pregnant with the little pirate, my doctor of course has been keeping up with my thyroid levels, as well he should, but with one problem. The man is convinced that a low TSH level means he needs to give me a higher dose of synthroid/levothyroxin. (TSH=Thyroid stimulating hormone, which tries to stimulate the thyroid gland to produce more of its hormone so when I'm taking a higher dose than necessary it will be low. Not high enough dose means I'll get high levels of TSH) I tell him as politely as I can "That doesn't sound right, low TSH means I'm taking enough, or too much..."
"Nope, you're not taking enough and that's why you're getting sick." (Mind you, for all the symptoms caused by a high TSH level, getting sick has never been one of them) Dude would NOT listen to me and prescribed me MORE synthroid and he admitted me for the night and when I realized he wasn't going to let me go home until my TSH levels went up to where he wanted them (and so long as he kept prescribing me higher doses, they would continue going down) I signed out AMA because he also didn't listen when I said "Um, but that will take at least 2 weeks for it to show up in a blood test, if not longer and I can't stay in the hospital that long!" Nope, I was the stupid one because he knew EVERYTHING about hypothyroidism and the silly Marine Wife knew nothing.
I was so glad when I got transferred to another doc because he was transferred somewhere else. Oh and he also wondered why I wasn't gaining weight when I was taking 300mg of synthroid. As soon as I went to another doctor and had my dosage lowered to where it should be, I started gaining weight.
Later my mother tried to get me to get my dr's to put me on 300mg "Since you were so smart and thin when you were on that dose" Thankfully NONE of the drs I went to after that would risk my health like that.