I have been taking vicodin 500MG for almost a year now started with 1 or 2 daily now take at least 4 to 5 a day. For the past 5 months I have been getting nauseated and having moderate stomach aches they are not always in the same place sometimes in the lower rib cage, sometimes in the middle and sometimes above the belly button. I hate this feeling of not feeling normal anymore. Could this be due to taking more vicodin than i'm supposed to? Help