Uneducated needing educated

My last period I got was April 30th, it lasted 5 days per usual. I haven’t received another period since. I took a urine test on the 6th this month and it was negative, however I still haven’t gotten my period. I haven’t changed my diet, exercise or been under any unusual amount of stress. Was it possible that, that test was too early? Looking at my breasts today I have some sort of bumps there, which is abnormal. I’m not trying to get my hopes up, just needing some insight.