Ive been on the generic flexiril for over 6mnths and rain out a week ago, this is the only med i can take for my muscle spasm i get alot especially in my 'L' leg, well i called my doc mon for a refill and she wasnt in so her associate refused to call it in for me, i got it tues after i had to tell the nurse i only use it at nite when i need it. why were they giving me a hard time about giving me another refill..is it habit forming?