Upper stomach pains

Robyn • 1 Boy: 3/21/16; 1 Girl: 🌈11/09/17; New Baby 12/2018
Have any of you experienced this? 
I have been getting intense upper stomach pains. They do not last long but sometimes it is so intense I can't stand up straight. It feels like muscle tightening somewhere deep and right below my ribs. I'm 14.5 weeks. Heartburn?