I think my baby has a reflux issue!

What were the signs your baby did? My baby is a month old and he spits up a lot! Sometimes it's not just a small amount either! Today he spit up what seemed like everything he just ate! I think it's only gotten worse as he gets older. Sometimes I'm afraid of putting him flat at night because I don't want him to spit up and it not come out. He sometimes gets pretty fussy after a feeding. He also is super gassy and burps a ton. No matter much I try to prevent him getting excess air while eating.