i have contacted this recently, i am ttc with my husband, my periods for the last 4 months have only lasted a day, i really thought i was pregnant this month, but i got my period today which is a day early, but it's very pinky and watery, i put a tampon in and did my 2 mile run, whuch usually brings me on heavy, but there wasn't much on the tampon when i took it out, i have taken a HPT, 5 in total, but negative. what do you think this couold be, i'm going crazy here, please help. :-)