I need help with my 9 month old!?

Check to see if she has a fever or if she's shaking her head a lot or tugging at her ears, if so than it could be an ear infection. If you check all of the normal things and nothing is wrong than you can always do what I still do with my daughter... fly around. I can't think of the best way to explain it, lay her down on the floor belly down and put your hands underneath her tummy, pick her up in that position and fly her around the house, it will relieve any gas and if she's just fussy because she's bored than it can help with that too. Good luck!