As a child in a medical type family, let me first say to you: Never, ever ask a secretary, head nurse, or anyone else for anything like that. Go straight to the doctor. The doctors have all the power and their subordinates like to think they do.
The doctors know the rules, and if you had just gone to the doctor and asked, there should have been no problem. However, since you asked someone who either (a) did not know how to get the records, (b) did not know if they had the authority to give the records, or (c) you've just made the women's life a lot more complicated, because if she gives you the records herself she may be fired and/or sued. Don't even ask a technician for the results, they probably won't tell you for fear of being disciplined.
Basically, you asked the wrong person for the right information. Always ask the doctor––they can get it to you. He/she ordered the test, he/she is on the top of the totem pole, and he/she can do whatever the hell they want because they have passed board exams, medical school, and have M.D. after their name.
That said, the lady was stupid for not having a nurse ask the doctor about the issue. As to your manner, there are some good posts above that highlight the benefits of not being a dick.