Military and Family

I'm 18 years old and am planning on joining the united states navy as a career starter in the technical field. though this is a smart way to start my life, i have a major problem. as of septmber of this year (2011), I have a son. My son and fiancee both live with me but my problem is joining the military before we are married. if we are not married before i sign my contract then she and my son will not be able to live with me on base. she has been putting the marrige off for 3 to 4 months now. she's putting it off because she doesn't have her social security card or birth certificate. those are in her parents possessions, whom she doesn't want to know about us being married. my mother lost her job not too long ago and needs to get her job back, but can't because she has recently become ill and may have cancer. I have applied for plenty of jobs in my town and have gotten no replies. i'm sure whether or not i should sign my contract so i can send money to my family to support them so they can live with money and i can start my career, or to stay with them and be there to support them. i have asked my friends and family what i should do and i get 1 of 2 responses: response#1. get out of grayling while you still can otherwise you'll never go anywhere. or response #2. don't leave because your a good friend and i'm sure you will make it through. please a response or advice would be greatly appreciated. thank you for listening.