Help!

No one answered me when I posted this in the "period" section so I'll post here. This eve app tells me I am 2 days late. Another app I use to keep track of my period says I am 6days late! I had PROTECTED sex February 7, and although accidents can happen, my boyfriend didn't "release any babies" in me. After we did it, the following week or so I had a sorta light brown discharge. Today's the last day of the month, should I take a test, or am I just overreacting??