Like a lot of writers when I hit this point I am always a little worried that this will be the end--this will be the time when I lose it forever and never write again. This will be the time the words go away for good.
Even though experience has taught me that writing, like all creativity, is a cycle, I still have those moments of fear that I will never write again. There are times when I am bursting to get the words out (and cannot get them out fast enough) and times when it is more of a struggle. Not to mention times when the words won't come at all no matter how hard I try to make them. But I have always found that the words eventually come back. The writing always cycles back around.