Toddler Not Eating

I’m having such a hard time getting my daughter to eat. I try different foods and textures. Feeding her different ways and places but she might take a few bites if I’m lucky then wants out and/or throws the food away. She eats her oatmeal w/fruit fine for sitter. She’s not interested in milk either and I haven’t found a sippy cup she likes yet. She still likes her formula and toddler formula. She is petite but still! I go for her check up on Wednesday. Also I work so I’m not with her all day. Any tips from anyone who’s has this issue??