Have a question about a bank foreclosing on our home can they do it?

so heres the problem and im completely lost on what to do. about a year ago my dad died and he didnt have health insurance. i turned 18 a month before that so i received social security through his death all senior year. we were struggling with the bills because he was the primary income in the household and all ive had was a part time job. so mom and i have made due for these months and i am to go to boot camp Aug 22 for the Army and then i was going to continually pay the bills and help my mother out. our loan ran out on our house and we went to get it renewed and i co signed for my mom because she cannot work because she is disabled, yet is waiting for an apeal to get disability,. then a couple days ago the bank called and said that i cnt co sign because im going into the military, they said it was a new law obama passed to protect military personnel. so my mom cnt get a loan i cnt help her get one. the bank decided to foreclose on our home. we have made every payment and havnt been late. we have about 4 grand altogether to our name. once the bank takes the house we cnt buy another or even take out a loan to to buy another home. so now i am completely lost on what to do. is there anything we can do to try to keep the home? we owe 47 grand left on the house would they let a 19 year old with a credit score of 669 take out a loan that large without anyone co signing??