 [ Symptoms ] does dry mouth often go along with constipation [ Disease ] i am sorry to hear you are going through this stage fright can be a terrible thing first i want to point out that even though you feel extremely anxious the fact is you are playing the song sure your notes might be a bit shaky    but you are probably the only person who notices that you should give yourself a pat on the back for getting through the performance and have confidence in your ability to do this if it helps at all please know that many famous performers confess to having stage fright in fact the hugely successful singer adele recently said she often feels scared i am not going to be able to deliver  i doubt your performance anxiety requires medical treatment if possible talk to your music teacher or your fellow performers about this i bet you will find they also feel nervous about performing sometimes just knowing you are not alone is helpful best wishes to you and remember you can do it