I was due my perion on the 17th of november 2016 on my period tracker.. on the 18th i had light pink spotting.. so i thought my period was going to start.. woke up saturday morning my tampon was dark brown with some light pink and clear sticky mucus that happen for 4 days.. my period has never been like that always have regular period. I havent had a proper period yet ..had stomach cramps for about a day or 2 my breast were swollen . Peeing more than normal.. however took a pergnancy test on the day i was due it was negative.. can i be pregnant ..is there anyone who have had similar experiences