I need help. Please

Hello, I am a 16 year old girl in Tennessee (idk if state matters) and I need help badly. So I went a month without eating dec 25-Jan 26th. And I mean nothing, I had a couple prices of gum but that is it. I was drinking a lot water over this time though. Then when I did eat I only ate about 240 calories. And went another week and a half without eating before I ate 240 calories last night simply because I physically can’t go long my vision has started to double and I’m so light headed and nauseous. This morning I did eat more food (70 calories school vending machine beef jerky) but it hasn’t helped. I know I need to go to the hospital and I know I have an eating disorder I have come to terms with that. I’m asking for help with how. Do I go to the ER first then an inpatient place (I won’t be able to eat constantly without going to one)? What if my dad says no? Am I over exegeting it and it isn’t that bad? I weight 116 pounds but I look heavier, I was 150 dec 19th. I constantly move and walk and burn at least 2,300 cals a day but typically more. I’m writing this quickly because I want to talk to my dad about this tonight or tomorrow I can obviously provide more info and might comment some if I can think of any later, I’m just so tired. Thank you for reading I just need help and I’ve come to terms with that.

Update: I’m about to go home and talk to my home, my time it’s about 9 o clock at night, I’ll keep updating u guys on stuff. It’s gonna be a long night if anyone open to talk it might help/ would be appreciated.

Updated 2! I’m admitted in the hospital. My dad wasn’t happy at first and it too a lot of convincing. He didn’t see how it could’ve affected my organs or why I couldn’t just eat and he really didn’t want to take me. But I’m not the type to ask for help so after enough sobbing he took me. Then we get here and every nurse talked abt how proud they r of me and how much I needed this and I watched my dads demure change. he then would it really signed the treatment form because he didn’t agree to all of the conditions but then after the nurse said that they couldn’t treat me if he didn’t then he signed it so that’s really good and I’m really happy about that. My dad really hates it and doctors and really all of this and I’m glad that he’s trying but good news. All of my organs are OK. The only things that were low or my potassium and phosphate levels so now I have to drink a really gross drink and I am admitted into the hospital probably for the next couple days to a week and I’ll be monitoring what I’m eating and helping me get nutritionalists and stuff . I just wanna thank every single one of you. It means a lot to me. I didn’t sleep awake last night, so hopefully I’ll sleep soon.