Why didn't you dip it in rooting compound in the first place?
Rooting is possible, and your success will increase with the more leaf/stem you have to work with, as you know having as much of the portion where it attaches to the main stem increases your chance of success.
If the cutting is still green and in good shape, in my opinion, you are still in the game! But above all now, keep it moist (not wet) and beyond that, go find something else to do for another 4 months! Rooting cuttings need one thing most of all... patience!
Take care and good luck.