Theres a strong connection between your work life and your health today, and you need to watch your energy.
Your work life and your health are very closely connected today, so you need to stop and make sure you are not over-doing it. You may feel fine, but if you are working too hard you could be storing up trouble in your health without knowing it. Take regular breaks and do not push yourself too far. This is counter-productive as you will end up having to take time off when your body crashes.