Hair is not growing

Hello!  Despite my stylist's strong recommendation to get a "good trim", I have advised her to only perform "search and destroy" about twice a year.  I sooooo want my bra-strap length hair to be waist-length... 

Over the last year, my hair has only grown about 2, 2 1/2", literally.  That, to me, is obscenely slow.  I regularly deep condition with high-end, salon products, and have even lightened up on my straightening and flat-ironing, which I used to do all the time.  What's the problem? 

I have colored and highlighted hair, but nonetheless, this lack of growth seems very unusual to me.  I am in general good health, and take a multi-vitamin everyday, in conjunction with a Biotin supplement.

Has anyone ever heard of, or experienced this?

Thanks!

Wow... that sounds exactly like my story.  What Susan said was right though- hair gets to a certain point (and one of these is definitely midback) and grows ever so slowly.  It seems to happen once every 6 inches for me and it does last awhile.  The good thing is that your hair is growing, even if it's frustratingly slow.  Once it gets past that phase it should grow at a normal rate again.  But definitely keep doing the deep conditioning thing; it helps more than most other things I think.