Period 14 Days Late.. FREAKING OUT

Nysi
Hi, my period is 14 days late and that's very abnormal for me. I've never been sexually active so I know that I'm not pregnant. Yesterday I started having REALLY bad cramps and spotting that looked like old period blood, however, nothing substantial came out. I'm having ALL the symptoms of my period, without actually having one... 
I've been very very stressed lately due college finals and being sick so I know that can throw it off. But it doesn't seem completely thrown off... more like stuck and won't come out... someone help??