Feeling abnormal

So I'm like 30 days late, I've always been fairly regular & the past two periods have been totally off, but this is the longest I haven't had a period. I've been super emotional & my boobs have been hurting for weeks & some discharge but other then that nothing unusual. I don't think I'm pregnant (I've tested) I don't feel too stressed, everything has been fantastic lately, any ideas on what could be going on?