I am 2 weeks late for my period, but took 2 tests already and they were negative, what does this mean?

Some times the rhythm of you body just changes your "normal cycle" for some reason. There really is no "pin point" answer for the reason why, but it just happens. It could be stress, sickness, weight changes.. etc. It happens to many women and as you age it could happen more often. I am right there with you though, I have not had a Period since the 8th of Jan and my pregnancy test came out Neg. also. I think my body is just changing more as I get older.