9 week old & feeding issues Please help!?

My daughter had a lot if gas issues as well that continued after switching formula. I noticed that daughter was working very hard to get the formula out of her bottle. I changed to a medium flow nipple. That helped a lot! She is still having some issues with taking in air as she feeds, so I will take my aunt's suggestion of trying a different shaped nipple, one a little more elongated. Try a different flow for several days & see if that helps! It would be easier on your daughter than trying a new formula. I like to look at formula changed as a last option because of the stress it puts on a baby's body. Good luck!