You have to take time for yourself otherwise you cannot accomplish all of the things, big and small, that you came here to accomplish.
People will want many things from you (sometimes all at once) but if you are down with a cold you cannot provide for anyone.
The boundaries around taking care of ourselves and taking care of everyone else often times get blurred. And then when we want to take care of ourselves, many people who want many things from us will cry and cry harder for help. What should your reply be? If I cannot take care of me how can I take care of anyone else?
If we have too much on our plate we cannot be there for anyone and we need, first and foremost, to be there for ourselves.