Try changing the formula! Like if you use liquid formula use powered instead and the other way around. This was happening to a baby I know and the formula needed to be changed which cured the problem. Try that first and if that doesnt work see the doctor

She could have an allergy to the formula. My baby didn't like the soy and she vomited it up every time. She also was allergic to the regular milk formulas. I now have to give her the kind for sensitive tummies.

Something else you can try is make sure that you use the slowest flow nipple on the bottle as you can get. The one for newborns or number 0 if you can get it is the best one even for mine who is 8 months. It makes them eat more slowly and they have less chances of swallowing too much at one time or eating too much because they feel that they didn't suck long enough.

She could also just be really hungry and on a growth spurt. Babies can eat a lot more during this time, and sometimes more than they need, and what they don't need just comes back up! As long as she is happy and doesn't seem to be ill and is not running a temperature, then you probably don't need to worry.

Thank you.

She didn't spit up at all today, and has only had one bottle so far (she usually has two by now). I'm assuming she was on a growth spurt. I do have the slowest nipple, and I use the dropins, so I know she's not getting any air. She does seem to be a little moody lately, but I just think that's her personality showing though, lol.