I live in Utah. Me and my Ex got pregnant first part of Sept. When I got pregnant he aggreed to pay half of my medical bills which include three ER visits, a overnight hospital stay and three visits to my OB/GYN. I lost the baby and it was a three week process thus the hospital visits. While I was in the hospital he decided to get back with his ex girlfriend and break off our engagment. Now he is refusing to pay his half of the bills. What do I do?