@Michele I also have my lilith in Aries (third house) opposing my midheaven, within one degree. I am just learning about it -- I would love to you know if you have noticed anything note-worthy !
Lilith in the 6th house sounds sbout right. I've noticed that when I have physical symptoms, they are nearly ALWAYS connected to my emotional and psychological state. That's why I've had trouble being diagnosed before, and why I tend to avoid doctors. Naturopaths, at least, look at the WHOLE person.
I personally dont feel there is anything to fear at all with Lillith, except using her power for ill 
She was actually named as the first feminine, and even referred to in the bible as such for the religious amongst us, but she wasnt accepted thus pushed down into the depths and replaced by a more acceptly subserviant eve... or at least that is one version.
So she actually is one of the representatives of the sacred femine, its just important to remember that power runs through the emotions, so important to have oneself feeling good to use her help.
Bump
I had my BML return back in September 2011 when I (before that and, after that, moment) kicked ass work-wise. (Conjunct MC, exact.) Took control. Did it hard but gentle.
I was told by someone, who I considered smart, to drop the ball and let the new boss fail. I listened. I disagreed. Instead, I worked out a team situation, mentored new boss, and it's been win-win for all concerned since. (And that's a lot of win-wins.)
Many a sleepless night. Many an agonized moment. But, as per the myth, nobody or no circumstance kicks me out. I leave when I choose to leave. (Simplistic. But true.) I was not like that much, previously.
T-Saturn also made a pass (opposition) - repeatedly - over MC/BML.
(Astrology is pretty much blowing my brains these days.)