You need to look into the types of foods you are eating that cause acid reflux and adjust your diet. Everything you eat is equally affecting your child. He may react more harshly to some foods that others. Fruits and juices such as orange, pineapple and 100% fruit juices often cause acid flare ups. Some veggies may cause gas such as beans, broccoli, cabbage, etc.
You may consider expressing milk to feed to baby in a bottle. Put about a teaspoon of cooked cereal into the breastmilk and feed it to baby in a bottle. This heavier food will help keep the food from automatically coming up. You probably need to put your baby on an acid reflux medicine. I think there is a Zantac for babies.
My first son had a terrible bout with acid reflux. It was combined with a flap on the stomach that was not yet completed developed. The combination made him puke everything up like a possessed baby. I know that's a horrible image, but that's how gross it was... all the time. He lost 2 pounds after leaving the hospital. I had a super frustrating time trying to get him to gain weight, change pediatricians multiple times, went to multiple lactation consultants... talked to anyone that had advice.
I finally found a doctor that suggested putting a small amount of cooked cereal into his bottles. I had to stop breastfeeding and put him on soy formula. I had to always have him sitting up after eating, so basically he had to sit up 24x7. I would have him sit in his car seat, bouncer, swing, jumper in the hall way, put him in the infant carrier on my chest or hold him. When he would sleep, I would either hold him or strap him into his infant car seat and put the car seat into the crib with blankets. Because he puked so much, I kept baby sleeping close to me all the time. He ended up having a SIDS episode, and I had to rush him to the hospital to recesitate him. I think it had to do with the acid reflux and he choked on what was coming up.
We were not sure if he was allegic to something I was eating or what. The milk based formula made him spit up alot, so it might have been a dairy allergy. He doesn't seem to be allergic to dairy right now, and he'll drink milk, eat cheese and yogurt. He's 5 now.