Just went out to fly to take photos of the sun set due to all the bad weather we had over the past few days. Return home attitude set 100m and I was flying at 50m distance was only 175 feet and my drone started spinning in circles. Went north, south, east, and west. Fighting to control it ! Then I hit RTH and it still continued. Only way I got it back home was to fight then I landed hard right beside the car in my drive way. Wind 7 mph and this has never happen to me. However I was using my iPhone 6s Plus which I never fly with because sometimes the screen locks up. Any help will be appreciated. Only puts a small crack in the housing. Please help