9 month old won’t eat

Hey moms, my daughter is going to be 9 months in a couple days and she will not eat any kind of food. She won’t let me feed her she will only allow herself to feed her. But even than she only tries to do it twice and it just falls out her mouth. I’m worried she isn’t eating enough off my milk. I would totally give her formula but she doesn’t like it she spits it out. I try to force her to take other things and she won’t. Not even sweets!!! Can somebody tell me there experience in this or what to do!?! Please help...