Zantac Making Reflux Worse

Lilly

My daughter was diagnosed with reflux at two weeks. She didn't have many noticeable symptoms at the time (some spitting up while laying flat, gasping, etc.). We started Zantac and are 10 days in and she won't stop spitting up, upwards of twenty times a day. Is the Zantac causing this? I'm calling her doctor in the morning but wanted to see if anyone else has experienced this.