Frustrated at my plateauing!

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Hi everyone, so I'm getting really frustrated: Iv lost 27 kgs in the past 10months, and i've recently stepped up my fitness routine and been really good with my diet and cutting way down on alcohol, but i feel like i'm getting nowhere. I keep yoying between 90kgs and 86kgs, and it's getting me down. I feel like im putting so much hard work in but its not doing a thing, and i feel like i still have so far to go and im honestly loosing sight of my progress and motivation. Has anyone else experienced this? Its so hard not to compare yourself to others, as opposed to yourself, and i feel like im still so much bigger than a 'normal' girl. grrr.