Been extremely angry and confused lately. My progression is all over the place. My Standard of playing just seems to change day to day (in a bad way). This is especially noticeable in my range and often tone. I have a steady practice routine of about an hour a day, including tunes, long tones, slurs and other studies. been playing for about 18 months and this STUPID problem has been ongoing for about 1 month. What could this be caused by? Maybe I'm not resting enough? Should I just go with it and play as best I can? Paaaaaah.