Ketosis in four days

Started my 20g/day keto diet nine days ago.Following advice given in the book I entered ketosis on day four! I’m a retired woman have severe arthritis in both hands that is at times disabling. Yesterday (diet day 9) I realized that I hadn’t needed an afternoon Aleve (first time in a very long time), and at bedtime forgot to take my second Celebrex. My right hand ached a bit in the thumb and was a bit stiff, but nothing like “usual.” I felt the same this morning, which is generally my worst time of day. While it’s still early, I am so encouraged that keto will make a major difference in my life, and I’ve given up so little! And I’m losing weight while eating well (10lbs so far).