birth control pills - abnormal bleeding

hi, I"m 24 years old , I took birth control pills -BELARA from september 2008 to march 2009- half year then I stopped taking it for no reason .. now I"m taking the same pills again since two weeks .. but for the first time I"m bleeding ..I would say it's a moderate not mild bleeding.. i"m worried about this.. i"m confused becuase I used to take the same pills before without any side effects .. should I stop taking it ??? please help and tahnk u

It's common to have mild bleeding during the first and even the second pack of oral contraceptive after an interval or at the begining of oral contraceptive you should continue taking the pills .