What could this be?

Stephanie • Boyfriend: 12/29/2014 - Forever :) Baby Boy - 09/25/2016 and pregnant with baby #2 due 11/20/2017

I was having extremelyyyy severe chest pain only on the right side, it had traveled up my throat too, along with my right ear. I then threw up but still felt all the pain afterward. It's all gone now but now I have a headache on the right side. And I still feel really nauseous.