so idk if im pregnant or not. i had a normal period from aug. 8th to aug 15th. then me and my boyfriend had sex the 20th. the next day i started to have tiredness and my breats were extremely itchy and i was getting a bit dizzy as the days went on. then food started to taste wierd to me like metallicy. i started to have brown spots on my undies on the 22 then started to bleed the night of the 23. its now the 25 and im still bleeding with mild cramps and back aches. this isnt as heavy as my usual period but still a medium flow that fills up a pad during the day and 3/4th a tampon at night. what could this mean?