Suggest Treatment For Indigestion Due To Acid Reflux

My four month old had a pyloromyotomy at 1 1/2 months. She still suffered from significaht acid refluxwhoch she takes zantac. She eats for ounces of enfamil gentlease every 2 to 3 hours. For the last 3 to 4 weeks I have noticed changes she started spitting up more now its a few times with every bottle and its curdled Also her bowel movements have gotten progressivly abnormal. Normally they are dark green with no curds. Then every othe bowelmovement she had looked a little like it did before her surgey. A week later most of them were abmormal . A couple days ago I changed one and if it was neon green with what looked like black blood clots in it. I had it tested was not blood. Now shenis going a lot more frequently and its bright or pale yellow and curdled. She started teethining already but her fussiness seems a little extreme for that. I have two older girls. Also she has crazy bad gas. I need some insight as to whats going on with her. Thank you