Early pregnancy symptoms?

I had my period at the beginning of this month but about a week after I started having lower abdominal cramping and really bad waves of nausea. As well as extreme fatigue that have been going on for about the past week and a half. Everything I have read has said it could be early pregnancy symptoms. I have never had any issues with cramping or nausea while not on my period before so this has me a little paranoid!