Brown discharge while on Yasminelle

Patient: Hi. I started taking Yasminelle three months ago, everything OK. Now I’m on the 3rd week of the pack (just 5 pills left) but this morning I suddenly started having brown blood, a bit more than just spotting, and it feels just like when I’m having my period (almost having cramps). Should I skip the rest of the pills or finish the pack? I will call my doctor tomorrow to probably change contraceptive.