LO spitting up

Natalie

My 5 mo has been spitting up after most bottles. I took her to the doctor last week and he said to switch her formula from Enfamil gentlease to Enfamil AR and she is still spitting up after most bottles. I burp her in the middle of he bottle and at the end, I also sit her upright for a while after each bottle. I’m just not sure what to do at this point...any advice?