1. For traveling I have sedated her little bit over. Now she's sleeping all day along. What should I do?
2. She's scared of me. She tries to hide. And she Meo a lot. I don't know why. What should I do?
3. Her heartbeat's are hammering. ???
4. What type of food and medicine should I give her?
Do not give her any other medications. I would have strongly recommended you NOT sedate a kitten this small. That was not a good idea.
Her heartbeat is hammering because you overdosed her. Without knowing what you gave her and how much and when you gave it I really cannot comment much on this point.
Just leave her alone and let her sleep it off. Stop trying to force her to interact with you. In the future, do not sedate unless absolutely necessary and be sure you have the correct dosage.
Give her food made for kittens. She may not eat until the sedative wears off completely.
If you are truly worried about how she is acting then I suggest you get her to a vet for an exam.