Lanugo? Help from anyone who has been underweight/Anorexic please!

Hi 

I'll tell you a bit about myself to start - I'm 20, 5"7, 115lbs.  Highest weight was about 125lbs (about 3.5 years ago) and lowest weight was 105lbs (6 months ago)

Recently I have started noticing soft thin hair growing down the side of my face/jaw line.  I was SO worried and started researching online (I know how bad this can be) as I also have some pimples around my chin.  I went to the doctor to get blood tests done (hormone levels included) and everything is completely fine.  I was sure I had PCOS.  I never even thought about lanugo since I didn't have hair on my face until just recently (even when I was a lower weight).  I also have more hair generally over my whole body (chest, neck etc).  

Is it possible that this is Lanugo?  I've heard that people experience it a bit after they've been at their lowest weight..? The hair on my face is like the photo of Amy Winehouse here but not as bad http://www.2medusa.com/2008/03/warni ng-to-anorexics-lanugo-is-not.html - is this actually lanugo?

If so, does it go away when you get back to a higher weight?  I'm worried about getting hairier especially on my face!! This has definitely made me COMPLETELY certain I need to gain weight NOW.. I'd rather see myself as a bit chubbier than have facial hair :S 

Thanks very much for any responses!

I have light laguno on my face; it doesn't show much because it is fair, but I can see it and feel it. My BMI is 19. So it is very possible that what you have is laguno, as your BMI is a lot lower than mine.

I don't know if it goes away but I would assume so...

I have this also on my face and believe me I am not under weight. I think it is normal on the face but if you have it all over your body you should get it checked out.

Thanks.  Anyone else?  If it is Lanugo I have had it on my body for a long time (can't remember when it started) but have only recently started noticing it on my face and neck.  It's really thin and soft but quite long..