Hello everyone i am new here, just need some help...

Well. My last period was on May 13th and it is now July 2nd and still no period... I was late before(last year) almost 2 months but this time i am not sure... i get very light cramping and i am like "yea, my period is coming" (i been saying that for the past 2-3 weeks.). I am not really sure if i am pregnant. I just have sore breast (but i get that when my period is about to come aswell) I took a pregnancy test on June 25 and it was neg. .. any advice?