What Causes Prolonged Vaginal Bleeding After Skipping Levest Dosage?

Hello, I m currently on the contraceptive pill levest due to a holiday i decided not to have my 7 day break and continue onto a new pack of pills, when my next 7 day break came due to it being my first week in my new job I decided to again not come on my period and skip my 7 day break and start another pack of pills, however the 2nd time around I have came on my period (withdrawal bleed) anyway, and have been bleeding non stop now for over 7 days and it s not getting any lighter, I m still taking my pills but they re not stopping me from bleeding. I don t know what to do whether to stop taking them mid pack wait 7 days and start a new pack or just carry on taking them. It s getting me down constantly bleeding, stress of new job, feel like my hormones are all over the place:-(. Any help or advice would be greatly appreciated. Thankyou so much. Jen