Needing a fresh start

I started taking hydrocodone years ago, just recreationally.  When i had my first child ten months ago, i am had a C Section and was prescribed them.  I was taking them much more than directed, pretty much to get that high from them.  Than i started a new job where one of my co-workers was just giving me 25 or so a week.  I would pop one first thing to get day started and throughout the day because it made me feel more productive.  I have finally have decided that this is not how I want to live my life.  Depending on a pill to make life better.  I just took my last one and am refusing to take anymore.  I haven't been taking more than six 7.5 a day but will i still have withdrawals?  How long will it last if so?  

Thanks for any advice.