Anxious too. Occur in pill free week?

20th September: fingering with small amount of sperm I have irregular period LMP: 15th August So I have started to take deviry 10 from 1st October to 5th October daily once As my period is not started and I also take home urine pregnancy test on 17th October it shows negative that's why from 18th October I have again started to take deviry 10 daily  and on 21st October I experience bleeding and started to take dronis 20 then on 20 November I started to bleed and also started to take dronis 20 after end of this pack on 19th December I started to bleed and simultaneously following this scenario I bleed on 17th January then 15th February... But I want to is it really period or I am pregnant by fingering and taking this pills side effects are this bleeding ... I mean during pregnancy if a woman unknowingly takes this pills bleeding will occur in pill free week???