PRO ANSWER

Yes, it's normal.  What's happening to you is that you place yourself on such an emotional high completely focused on the holidays...its as if the holidays becomes everything you feel good about and everything you look forward to.  If you wrap yourself entirely around something that is temporary depending on it to give you life, then it is inevitable that when it goes away you will feel a bit lost.  It's okay to look forward to and enjoy the holidays....however, you have to be able to look at it as something that enhances your life..not something that makes your life.  Think about what other things make you happy?  What else brings you fullfillment on a daily basis?  You need to try and switch the focus on what you have, what brings you joy, and what you have to look forward to instead of what is lost or missing.  Do you seem to have a tendency to focus on loss?  Are you generally happy and content in your life? Or does the holidays perhaps seve as a lifeline removing you from a reality that is not that fullfilling to begin with?  I apologize for all of the questions, but i just want to encourage you to explore what thoughts lead you to these feelings of sadness and emptiness after the holidays are over.  It seems possible that the holidays may in fact be filling a void for you.  Consider what happens to an individual when they take a drug... if they are unhappy and the drug brings them temporary happiness through a false escape, then the way they feel after experiencing the escape is going to be worse than how they felt before experiencing the escape in the first place.  You are left feeling empty after the holidays and dont feel better until you have something new to look forward to... the spring... a new season.  Remember that it is your thoughts that create your feelings... so try tapping into what you are really thinking about when the holidays come to a close...also.. remember that just because it lasted you so long in the past doesnt mean thats what will happen every year.  Dont expect it... you create what you expect.... just know that with a little work, you can snap yourself out of this.  Don't hesitate to contact me further if you are interested in speaking further about this.  Good luck to you!