What could it be?

So my period ended and 2 days later, I had some spotting when I wiped. My first thought was implantation bleeding but thought it was weird since it was 2 days after I had ended my cycle. I then started feeling nauseous and crampy with some fatigue symptoms, as well as not being hungry and the thought of food made me feel sick. I decided to take a pregnancy test and I feel that I saw a vvfl and so I decided to wait and test again a day or 2 later with a different brand and it didn't show anything. I still get a little crampy here and there and still don't have an appetite and food makes me feel nauseous.. i am on the 10-12 day before I am supposed to start. Is it possible to be pregnant?