Am I pregnant?

Bethany
I've never posted on here before but I'm now 15 days late with my period and my nipples are incredibly sore. I can't find any of the pregnancy tests I use to have laying around. Plus I have now cried three times over the smallest of things and I hardly ever cry. So I'd like to ask for some of y'all's opinion. 
Should I go get a test or wait it out and see if I get my period next month? 
Has anyone had the pregnancys start out like his.