3 days late

so I am 3 days late for my period, and have not done a home test yet. I got a negative blood test at the doctor 5 days prior to my period start date. For 4 days now ive been having breast pain. They are achy and just feel really heavy. I had mild back pain the day my period was supposed to start but no cramping. I have been eating nonstop I swear. My boyfriend and my mother noticed a significant change in my appetite. A lot of things ive never liked I'm now eating, and somethings ive always loved I cannot stand. Today I ate lettuce dipped in miracle whip.... which i dont like miracle whip. Ive been sleeping a bit more than usual too. But those are the only things ive noticed. These symptoms do not match up with my normal menstrual symptoms. Not sure what to do. Should I spend the money on another test, or trust that the doctor was right?