i tested, it said negative. The next day i got a very light three day period

Hi, im in the pill six years, in a relationship five years now, wen i was on hols, i forgot a few pills in may, this is my only form of contraception. ok so i got a period the 12th of may, fine. Then im june i was a whole week late so i tested, it said negative. The next day i got a very light three day period, brown blood. Then two weeks later, as in three days ago, i got a pale pink whitey discharge, then two days of spotting brown blood, extremely light spotting, i have been exhausted and just feeling off. And i know it could b implanation blood cause i had sex exactly two weeks before i got the pale pink discharge. But i would like somebody who knows to help me, im 22 so havnt a clue x