I've had to endure just about EVERY violating test they could think of over the last 2 years, and they still don't know whats wrong with me. I think my mother dropped me on my head or something! It all started with what they "thought" was appendicitis. It wasn't. I've had recurring pain though for a few years, and all I get is pain killers, and a pat on the back...telling me - it' ain't cancer! sigh.
The worst part of the tests is the anticipation I think. Oh, and also when they inject stuff into your muscles instead of your veins by accident. THAT is worse too.