It is the mark of a truly good and caring society when others care for those in need. But there are times when pressure, guilt, or other factors press people to continue to act selflessly at the expense of their own personal health, be that physical, mental, or emotional.
As has been said by many, to many, "You have to look out for yourself first - if you don't, your ability to look out for anyone else is compromised." This doesn't mean you should live a totally selfish life, far from it! One simply needs a balance in all things, and this is just one example. Make sure to take time for yourself. Try to get enough sleep, Eat as well as you can. Resolve troubling issues as you're able. Take care of yourself! When you're in a good place, you're significantly more capable of helping others, and you should! But remember to watch out for yourself as you do, so others don't end up having to take care of you. :)