Early Labor?!?!

Ashley • Baby #2 is due!
I'm 24 weeks pregnant and been having a lot of problems with stomach spasms the past few weeks and yesterday I had a ton of pressure and was very sore. My heart all of a sudden began racing and pumping hard. 199 bpm. My stomach is very queasy right now and crampy feeling. We are on the way to the er and called ahead and they said to go to labor and delivery!! Somebody please give me some reassurance!