Hello girls, can you tell me what it could be? A week ago my period en…

Hello girls, can you tell me what it could be? A week ago my period ended, I've been taking Regulon (hormones) for three days. Yesterday I missed one tab on the next day, I took it as prescribed, and today I have discharge and my stomach hurts like during my period, although there are more pills than half a pack, what should I do? Should I continue taking them?