Help! Can't seem to lose weight

Hi



I started off eating 1500 calories a day, no excercise and I lost about 1lb a week.



For the past week I have ate 1300 calories and done cardio and yoga half an hour a day in total .

Got on the scales and I have put on 1 lb



Any suggestions / help

Thanks ! :)



I'm 24 and 308 pounds and have a sedentary job