Reflux in infants?

My daughter is a month old and I’ve noticed more and more that she gets hiccups a lot, more than normal, she seems agitated during feedings at times& will arch her back and cry and is extremely gasy. She spits up almost every time she eats, especially when I lay her flat and sometimes even elevated slightly. And more and more often it seems like she’s throwing up about a half oz or more. There are times where her spit up is very acidic with hardly any formula in it. She also will kinda smack her lips like she’s swallowing spit up in her sleep. Does this sound like reflux to any of you or am I over thinking it?? I will be bringing it up to her doctor at her appointment this Friday also..