Reflux?

𝓂𝒾𝓁𝓀𝓎 𝓂𝒶𝓂𝒶 • 🌿adelynn 9.14.16 & baby koston 12.31.18🌱
I'm hoping some ladies will be able to help me. For over a week now, my 3 weeker has been crying like crazy before, during, and right after feedings and then while trying to poop, fart, or burp as well. I've read that all of this could be signs of reflux and was curious to know if other mommies with babies that have reflux could share how they went about finding out for sure and what the symptoms were?