Please help please please please?

my daugher is in the army national guard, she's 21.She contacted me yesterday and said i cut my wrist and ried to kill myself.......My fiirst thought was omg wtf .So I asked her what wasw so special about the day that she did this and her response was aperently nothing then she goes on o say that when she told her friends they showed more consern than i was i replied honey im sorry im just trying to understand this whole thing.Then she says that she cant continue to be our hero and i say of course honey i never meant to put extra stress and stain on you than you already have what can i do to help to support you through this hard time her response was you have enough hard things going on in your life right now to be able o help me right now .Once again im otally confused and feel as though i need to be a dr. in order to handle this properly mind you i still have two other children a home teenagers i also have a 20 yr. son who is also in the army acive duty i know tha i have alo of responsibilities but its always been that way every since i was 16 and im 38 now they [my children] all four of them have always know life with one another and right now my daughter is pulling away and blaiming my parenting skills in a neg. and all the while she has been deployed her father and i have keepher car insurance up as well as the car she as well has a dog that i keep feed weel and properly cared for and she thinks tha all she has is her friends and she is ready to move on wih her life without her family [us] if we cant properly support her huhhhhhhhhhhh !!!!!!!!!