Mortgage/Note Home retention in foreclosure

i'm divorced and my ex-husband died last year. in the divorce, the home was signed over to me soley, by quitclaim deed and there was a line of credit on the home (no 1st mortgage) which he agreed to pay in the divorce agreement (he's the one that took all the money from the loan). i had to sign off on the line of credit (married at the time and we live in florida), but my name is not on the note or loan itself to repay. upon his death, i found out it's terribly past due. i make payments every month, but can't get caught up and they are threatening to foreclose if i don't pay the past due in full. my question is this: if i'm the only one on the deed but not on the note (or financially responsible for this loan) and my ex is deceased, can they still foreclose and take my home? my credit is awful and i can't get approved to refinance and there's no equity to just sell it and start over. is there any way, aside from paying off the loan in full (and that's not possible), that i can keep my home?? and if so, please tell me how!! i have 3 kids, i can't be homeless...please help!!!