Is this business for sale?

I met someone during a stay in hospital this year and we became friendly and exchanged phone numbers upon discharge. They called me last wednesday saying a mix up with benefits had left them with no money but come tuesday all would be sorted and they could repay the loan they asked for and I gave. Chasing it today as unpaid yesterday and they insisted on my address details ? Have I just been scammed? they now have my name, date of birth from the hospital and now my address or I'm being paranoid?