Could this be acid reflux?

Hi, I'm a 13 year old girl. A little over a year ago, I started to occasionally get this thing that sort of seems like acid reflux but sort of doesn't. I get it where it feels like there's a tiny bit of acid or vomit trying to come up my throat. Sometimes it happens out of the blue, but most of the time it is caused by when I burp, and then I can feel a tiny bit of acid coming up my throat. Usually, I have that feeling that I need to burp for a minute or two before the burp actually comes up. The acid has never made it to my mouth though (it has never made me throw up so far). You'd think it was acid reflux, but the weird part is, I have never gotten that 'burning' sensation in my throat when the acid comes up and it is almost never accompanied by any pain. If I get it, which luckily isn't too often, it is usually after I eat, but sometimes happens when I am really, really hungry. It can also happen if I drink a lot of water or other liquid. Usually, when I get this, the amount of acid I feel coming up is so incredibly tiny that I just ignore it. However, these past two days it has been pretty bad- to the point where I have to take a Tums to calm it down. Yesterday, it was caused by when I ate a yogurt like super fast (I must have downed it in under a minute!) and then went looking at garage sales with my mom and my sister. While we were looking, I burped and enough stuff came up that I thought I was actually going to throw up a tiny bit (luckily, I didn't, and I got home, had a Tums, and was fine). Today, I got it after eating a bean burrito fairly fast, and then having a hot chocolate. This time, I had a chest ache along with a little bit of the acid coming up my throat when I burp. Once I got home, I had to take a Tums. So I'm wondering- is this acid reflux if I get the acid coming up feeling but no burning what so ever? Also, any ideas on how to cure it and what it might be caused by? It's never been this bad before, and it's getting kind of annoying. Thanks!