No period, negative tests!

So I was suppose to have started on Jan 30. It's now Feb 2. Still no period. I have had regular, on time periods for years! My boobs are sore and different looking, my cm for two days was slight creamy white while these last two days have been normal (for me) watery. I have been having headaches, feeling real sluggish and nothing sounds good to eat. I took a pregnancy test the first day of missed period, negative. The third day, negative. Today, negative!!! I have been keeping track as I'm suppose to, ovulating when I'm suppose too. Have been trying for two years to get pregnant and now no period, I got excited!! Only to be disappointed by three negatives. I'm so sad! Can anyone help me with what this may be? I know I have to go to the doctors but right now it would be nice to know if anyone else has experienced this and/or what you may think? Thank you much.