Slow flow nipple

A

My baby is 2 months and drinking 3 oz sometimes 4 with the slow flow nipple still. I tried to go one nipple up but it still seems too fast for her and it’s spilling out of her mouth and she chokes. But the thing is I think she gets tired fast from the slow flow nipple and doesn’t always finish her bottle.

Any suggestions??

Do I wait to move her up to the next nipple ?