Irregular periods & blood while fingerin

I am having an irregular periods from a long time ago.Last i had my periods on 14 November and then after that i didn't get my periods for 2 months .after that i consult a doctor and she prescribed me a medicine which i have to eat for 3 days and after 7-10 days i got my periods on 2nd feb then after that i had sex for first time and i bleed like little spots not much bleeding happened .we had sex with proper protection And now its 16 march i didn't got my periods . Last night i was self satisfying myself .i was doing fingering and i have a bleeding alot once i felt like i got my periods but it was not periods .so can i get to know why did i bleed alot during fingering as my hymen is already broken when i had sex .