with the cold (chicago) and my coats, etc., i have been experiencing lots of breakage and shedding. so, i decided to open my bottle of nexxus emergencee. i have used it three times in the past 2 weeks (after each shampoo). i actually like the way my hair feels after...very strong and supple and the shedding has eased up. now i'm scared though, am i using it too often????