please help me with my 9 month old baby
It would be best to take her to the ER immediately.
Fever , vomiting and coughing should not be ignored in a 9 months old baby – it is best to get a certified physician to have a look at the baby and tell you after a clinical evaluation whether there is a cause of alam or not.
I would strongly advise you against trying any self medication and also do not try to force the baby to eat as she might aspirate.
You could try some tap water sponging to bring the fever down
Let us know about what the doctor advises and about how she is doing.