I'm really scared, I don't want a tube shoved down my throat. I don't want to be forced to be fat! What can I do???

Hey everyone, I haven't posted on here for a while but I'm scared and need some advise. 

My mum told me on Friday that if I lose any more weight she's going to take me to the hospital were they can make me gain weight :( 
I'm scared I don't want a tube shoved down my throat that's going to pump fat into me. I already have enough fat on me. 
I still really want to lose at least 7 pounds. Well that's the bare minimum, I want to lose 15 pounds and it would be amazing if I could lose the 25 pounds I'm aiming for.  I even find myself thinking wouldn't it be cool to lose 29 pounds and be under 100 pounds. I'd be 98 pounds only 2 digit number! 
Realistically though I can't lose that much. 
But still as you see I want to lose weight I don't forced to be fat! 
I hate saying this, but I feel my mums just jealous because I look exactly like her just skinny and I know she's extremely insecure about her weight. She won't even let us take picture of her half the time. 

Anyways I'm really scared I don't want to be forced to be fat, I already feel to fat in areas. Especially my thighs and stomach. 
What can I do??? I tried asking a pro Ana sight but didn't really find anything besides drink water before being weighed and stick stuff in your pockets. 

Anyways what should or what can I do???

Thanks