Is It Safe To Take Daphe Pills For Irregular Menstruation?

hi!imy name is len,i1ve been taking daphe pills for 2 yrs and 8 months now.my concern is i have irregularities on my menstruation like i had menstruation for 2 wks now.on the first 5 days it was light bleeding and the ff days it was heavy.i'm almost done with my pack and i want to stop using pills.i also had pain on my right lower abdomen last october.my question is,is it ok if i stop using pills after my present pack,is there any possibilities that i got pregnant if i stop it?i dont wanna get preggy again.what are the preparations before i stop it?