Baby eating

My babygirl nursed 8 times in 24 hours totaling 54mins. She nurses about 6 minutes every 3 hours. Is this a fine amount? I nurse until she quits so I'm guessing it is? She was 7lbs 5oz when born and dropped to 6 10 at 3 days now she is 3 weeks old and weighed 7lbs 4oz. Just worry and question everything as. FTM