Last summer I developed an issue in which I had some pressure that backed up in the back of my nose. It lasted for about 4 months, then went away. I don't remember exactly how I solved it though. After just practicing for about a half an hour, I discovered that that issue may be back. It only happened when I played higher notes. Also, I was on vacation for a week and ultimately had to take a week long break from playing. Does anyone have any familiarities with this issue? If so, how can I solve it within a month? It took so long the first time around because my lesson teacher and I had never heard of the issue. Thanks for the help!