I got 10 pounds!! Help?

So I had been around 105lbs for a long time but now I'm 115lbs! (I'm short) My body now looks like a fucking pig!!
Im going to the pool party in March and at the party we all wear bikini. All girls who saw me in bikini 3,4 months ago and complimented me on my body are coming! I'm scared how they will react to my current fat body!

So please give me some tips and motivation to loose a weight. Now I've been literally out of control and eating whatever I feel like to eat! So please help.
I got 10 pounds!! Help?
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