Pop in my Ribs?

I'm currently 37 + 2 days, as I was brushing my teeth earlier, I bend over a little over the sink, as soon as I did that, I felt and heard a pop in my right side of ribs.
I'm in sooo much pain, I can't sit up, move around much. I seriously have to be laying down on my good side. The pain was so bad I started bawling my eyes out. 😢😢 
What could it be? I feel like if i were to go to the hospital, it would be useless.