Products to prevent spit up

Lauren 🐬

I am a first time mom and we are having trouble with our LO spitting up. We are reducing the amount of milk he gets and feeding more frequently. He burps well too. He has more issues when he is laying flat like during changing or in his bassinet. Does anyone have any sort of sleeping device or oral product recommendations to reduce his spit up? I saw this contoured pillow but knew not about it so I did not buy it. Thank you for the suggestions!