Had a period but Could I still be pregnant?

this is my calendar from July. My period came 4 days early this month and it was a weird color and wasn't clotty like normal. I tested on the 15th and the 21st. Both negative. But I have been really nauseous and hungry the past few days. I am exhausted. My veins are really visible and I super moody. I feel bloated a lot of the time and I have had lots of EWCM. I know that it's unlikely, but could I still be pregnant?