3 months late

Selena • love the life god has gave you and be a story in his book that’ll shock the world.

So my last period was December 14, 2017 not once have I had any symptoms that I’m getting my period or that I’m pregnant. I’ve taken so many test and they all come back negative. And my man is convinced that I’m pregnant. What should I do??? Had this ever happened to any of you?