I Started Taking Pimolut N Yesterday, 3 Days Before My

I started taking Pimolut N yesterday, 3 days before my period as directed by my doctor to delay my period coming up. I took the first pill around 6am and then around 8:30am I bled quite a lot. The bleeding didn’t soak my pad that I put on but I had like brown discharge. I then took another pill around 12:30pm and then again around 9pm (I was directed 3 doses a day). I woke up this morning and I still have brown discharge. Is this my period or is it a side effect of taking the pill? Should I continue taking the pills? Will they still be effective in delaying my period or will I have brown discharge for the duration of me taking the pills ?