Normally, I can reach at least a B or C above the staff, without very much difficulty. For the last couple of days, I have found it harder to get the notes to come out right. It takes a moment for the notes to come out. Also, something seems different with the way I play in the last few days. My tome isn't as good as normal, and my tonging seems to be not as clean as normal. Anyone have any ideas what might be causing this or what I can do to fix it? Thanks!