Have you had your blood sugar checked lately? A lady that I worked with was the sweetest person you could ever want to meet. Over a period of about two months, she became very grumpy and just right down mean. I ask her if she had a doctor's appointment any time soon and she did. I told her to get her blood sugar checked. She came back a few days later and told me I had saved her life. Her sugar was over 350. After getting on medicine she was back to old sweet self.
Hope you are better soon!