10 kg is too much to lose in less than 2 months. Safe weight loss is 1-2 lbs/week, which is only 0.45 - 0.90 kg. While you can lose more than that, you can't necessarily do it safely and it might not be fat; you may end up losing all water or muscle.
Even at that, this would be a good time to start your weight loss journey, and make it a lifestyle change that you can live with from now on, so you'll always be ready for whatever comes up... We can help you with that, if you like.