not enough information here to tell.
Here is Grete Waitz' checklist for determining if one is over-trained. Three or more suggests over-training:
1) Does my normally comfortable pace feel difficult?
2) Do my legs feel 'heavy' for far longer than usual after a hard workout or race?
3) Do I find it harder than usual to climb steps?
4) Do I dread the thought of training?
5) Is it hard to get out of bed in the morning?
6) Is my appetite below-normal?
7) Am I more susceptible to colds, flu, headaches, and infections in general?
8) As I carry out my normal activities, is my heart rate five to 10 beats higher than usual?
9) Is my heart rate during exercise above- normal?
I'd add to this:
-being constantly thirsty despite drinking plenty of water
-difficulty sleeping