Emma has a heachache

Everyone knows that booking with her is very difficult.  I booked my appointment with her more than 1 week ahead.  Today, after confirming my appointment for tomorrow, I have booked a day off.  She texted me at the end of day and cancelled because she has a headache tomorrow.  While I am disappointed but completely understand that it may be that time of the month for her.  Having said that, it still bother me that I might have been bumped because she has another last minute preferred regular.  Did she cancelled anyone else for tomorrow?  I guess that it doesn't matter what the reason is; she has her right to choose her customer and time she work.  Oh well, it is a good thing that I have a long TDL.