14 days late

So I have always had irregular periods. I once missed 6 months because I had arcinic poisoning. And last month it was almost 28 days late. My concern is im not currently on BC and have had sex in the past month. However I also have been under a ton of stress. 
I have zero symptoms of early pregnancy and have no real symptoms of my period either.  
So should I take a test? Is it to early to know? Or should I just wait a few more days?