I Was Due For My Period April 12. I Had

I was due for my period April 12. I had brown and then red blood a week early with light cramping for 3 days. My egg dropped March 29th (I can feel it each month). Morning first response test was negative today. I have felt nauseous and dizzy off and on for a week but my test was negative. I had clear slippery discharge today. Was it a chemical pregnancy last week? If so, why do I have symptoms still?