Anyone else?

Brittany • 19. Engaged to the love of my life. Been together for 2.5 years. 2 amazing step kids. And a ftm , to our son who was born February 3, 2016. ❤
So I just started having this pain on my left side like right underneath my belly and it hurts to stand up straight and walk! Its not like very sharp but it is pretty painful. Anyone else have this? Know what it could be?