I'm always really regular and start within a few days of the 4 week mark from my previous period. 4 weeks was Wednesday and it's now Saturday. I've taken 2 test both have been negative. I've been having some light cramping for the last week and a half, dizziness, fatigue, nausea, sore breasts. This is our 5th month ttc. Has anyone else experienced this? I just wish I knew what is going on with my body.