Advice needed please!

Stephanie
I'm 37w4d...
Last night I had a sudden pain which felt like in my stomach that lasted for about 15 minutes. It took my breathe away and felt like servere indigestion. After some crying and bizarre positions it stopped. 
Well exactly the same time tonight, it happened again only this time my tummy went rock solid. I would think contractions but the pain makes me breathless as if it's heartburn at the very top of my tummy!
Has anyone had this!?