How far along is everyone and due date?

Torie • Tue, Sep 06 • Hey! Im 17 and a senior in H.S. Me and my boyfriend of 3 years are expecting our first baby!❤ Due May 16th, 2017👶

I took a test yesterday and took another test this morning and both were positive. Im still in shock but according to my app im 4 weeks and due date is the 14th or 16th of May.