Plateaued after 2 days?

The first day I lost 1kg, and then again on day 2, then stayed the same- 86.5kg in the morning, and climbing back up to 87 by night. I'm exercising and eating 1450 calories a day. I just want the scale to keep going down, but I think it's impossible for me to lose weight. I'm on 15mg topiramate BTW...