Sometimes Mothering Hurts

I sometimes wonder if I have something wrong with me because I love my children so much and I want to do all I can to help them, but sometimes when they share their pains and frustrations I physically hurt as if it is all happening to me multiple times of intensity than they must be feeling. I wonder if it is just pain of not knowing how to help them, or transference of their pain, but I really don't like it, but I guess I like it better than not being there for them.