Finasteride is an underestimated and dangerous pill for hair loss. Its hard to stop it and not experience libido issues. You are lucky enough that you took it for so little time. There are other people taking it for years facing serious hormonal side effects. It will probably take as long as you took the tablets to feel like before. So a couple of months is a good projection as this pill changes hormonal balance in your blood and gene expression about androgen receptors. There is a Swedish study that states the permanent dangers of this drug :
In 2008, the Swedish Medical Products Association reported that men who used Propecia may be more likely to suffer from irreversible sexual dysfunction. The organization soon required that Merck updated the safety labeling to include this important risk information. Several other European health authorities also required Merck to make these safety label updates, including the United Kingdom’s Medical and Healthcare Products Regulatory Agency. However, Merck did not make the same safety label updates in the United States until the summer of 2011.
I treat quite a lot of men for post-finasteride syndrome (PFS). It is not possible to answer your question since there are no rules with this horrible condition. It may be a question of waiting and seeing