Good start but stopped losing weight almost immediately

Julani34

I lost 2 kgs in my first 2 days on mfp but then i felt weak and hungry and set my goal from 1kg/wk loss to 0.75 kg and it stopped and I gained back a half a kg. It's been 10 days since and I don't understand what is happening? I have 20 kgs to lose and I log everything and even exercise, 7 minutes and I jog/walked once. Is there anything I can do to kick start the weight loss off again? I'm getting mega frustrated. I don't want to go back to 1200 cals a day as I had no energy but I'm not losing on 1300.