I m just confused. For taking ipill?

I hv face some problem in my periods cycle... Last month I had period date 2nd March.. den I had unprotected sex 3 times in different dates... last 3rd time when I had unprotected sex I take ipill but it was 3rd day of my unprotected sex...but it was not fully unprotected we use condom but last time get unprotected for the satisfaction it was my 10 days of my last period date ... den I had suddenly bleeding before 8days of my periods... 26th March it was .. But it was very light period... it was periods or it was bleeding affect for taking ipill? Bcs normally my periods date not jump that much day before.. its normally jump 2 day to 5days ... 3days light periods was continued after that its feel again I get periods but no ... all time I feel that's... every time I feel the periods pain but no periods... I m just confused 26th March which bleeding was started it was periods or extra bleeding... that y I 4th April nd 5th April 2times doing kit test it was negative..I m just confused.