My last period was on December 15 2012, it lasted about 6 days it is now Jan 21 2012, about a week late. When my period was due, i woke up with a light brown spot on underwear, then nothing after that. My boobs are sensitive, i dont have cramps at all, but i off and on get a lower side pain (stabbing feeling), ive been feeling extremely faint, and tired alot. sometimes it feels like i have to throw up, but i dont. I have took 2 tests yesterday (Jan 20) both negative. Is it to early to tell? Has this happened to anyone? Please help. Any advice or feedback is really appreciated!