Refuses to eat!

My 3 year old is refusing to eat. Even her favorite things she just sits there and looks at it. Night before last I made hot dogs and Mac and cheese her favorite she sat there for like an hour and said she just wanted to go to bed. She had a doctors appointment for her night terrors yesterday so my husband took off because our little had an appointment as well. We went to her favorite restaurant for lunch she just sat there and looked at it. Last night same thing with dinner she just kept saying she wanted to go to bed. Same thing this morning for breakfast I offered her 3 different things including my breakfast and nothing! I know she’s starving how do I get her to eat? Is there something I can get maybe like a meal replacement she can drink or something so I know she’s getting something?