Is the second financing I obtained from the bank, after the fatwa that permitted the first but advised against taking a second except for building a house, considered haram? And what should I do if it is, knowing that I cannot repay it except in installments?

The ruling on financing is a branch of its conceptualization, and it cannot be ruled upon without knowing its nature. Financing takes multiple forms, and its ruling varies depending on these forms. If the transaction is among those about which scholars have differed, and a trusted scholar has been consulted, then it is permissible to follow his opinion. One should not ask excessively about it, especially after acting upon the fatwa (definition), so as to avoid confusion and disturbance.