Spitting up

My baby is almost 4 months & he just keeps spitting up its driving me nutssss!!! I’ve tried 6 different formulas & NOTHING!! Hes at 6oz every 3/4 hours spits up EVERY feed! I’ve tried feeding 4oz every 3/4 hours still spitting up!! I’ve tried smaller nipples to see if maybe he’s just eating too fast but even when he eats slow he still spits up... I’m tired of all the dirty laundry his & MINE from my close to my bed sheets to the dog!!!! Lmao help pleaseeeee