Feeling fatigue and problem in sleeping

Hey fb family, this is my first post. I am following fb for last 5 months and got Amazing results without quutting on sugar or any diet. I am just sticked to eat home made and no packaged food. I have lost 7 kgs.now I stuck here. But problem I am got is I feel fatigue after getting up from sitting in squatting positions. I couldn't straighten my knee of eight leg instantly and even I could get proper sleep on few nights. In don't know where i am going wrong . Kindly help friends.