Wellness is an overall package of your being, wellness is the process of realising who you are, how you feel, what your body physically requires to live a healthy, fulfilling life, and making the choice to be well through complete awareness.
Your mood is how you feel at any moment, you can be in a good mood and feel happy, or in a bad mood, where you will most probably feel agitated and grumpy.
Signs of overtraining maybe increased body fat, a higher risk of dehydration, lower sex drive, and mood swings.