Just when you think things can't get any worse!

I just found out today that my mother, has got breast cancer. I am already full of so much sadness. My heart feels like it will burst. I am so concumed by my own issues, and now we have another to add to the heartache. I have always seen my self as such a strong person, but now I find my self feeling so weak and powerless. Why is god giving me so much to deal with all at once?