Crazy symptoms . Could I be??

So AF has yet to arrive and it has been 11 days. I have sharp pains in my nipples,racing heart and now I have this pain on my lower left side. My back is always hurting and I'm never full. I took two test. One at one day of missed period and one at 8 days.. when should I test again?? Or even go to a doctor ?? This heart racing thing is scary ???