What is this called? HELP!!!

Hey everyone so I'm currently 22 weeks pregnant and probably since I've been about 18 weeks pregnant I feel like something is just sitting on top of my chest like whatever I eat or drink is sitting on top of my chest especially late at night if I'm sitting up or laying down and if I cough I feel like it's about to come up but it doesn't so is that acid reflux or indigestion but I don't get heartburn I might get gassy from time to time because of food but it just feels like liquids and food takes forever to go down and it's so uncomfortable and I'm having a girl if that means anything to the response.