You're doing just fine ! The weight doesn't magically drop off the minute we decide we need to lose. This isn't the Biggest Loser. Those types of losses are just not typical. In general, a safe weekly weight loss would be 1-2 pounds (about .5-1kg) per week. However, there may be weeks when you don't lose. There may even be weeks when you gain. That doesn't mean you're doing something wrong.
Your weight is not a static number. It really does go up and down as we lose. And that's perfectly normal. So, don't worry, you really are doing just fine.
Remember, there is more to good health than a number that stares at us from between our toes in the morning. Think about all the changes you can't see !! Are you noticing that you have a bit more energy ? are you sleeping a bit better ? can you walk up stairs without getting out of breathe ? Can you do more push ups today than you could when you started ? Are your clothes fitting better ?
You're going to notice a lot of changes to your body over the next few weeks and months. Some of those positive changes you won't see on the scale. Do you know that if your blood pressure decreases and the scale doesn't, your doctor would still be thrilled. Lowering your blood pressure is a huge sign of success.
Don't just look at the scale as a way to gauge your success at a healthy lifestyle. Look for other subtle signs of success too !