Freaking out!

Camille • Happily married. Expecting first baby May 2015.
Last night I had a extremely painful back pain on my right side so I took in acetaminophen and within 30 minutes my lower chest and stomach or hurting like there was a lot of pressure and I couldn't breathe properly I also started throwing up that lasted for about an hour or two and I haven't felt the baby move since. Is this normal at all or should I go to the emergency room?!