Too late to do anything about it, but topping autos is not a suggested technique.
Your plant with its barely formed growth was nowhere near ready for "fimming" and all you have achieved is to stunt your plant by topping it at such an undeveloped size/age. Impatience and cannabis cultivation do not belong in the same sentence.
Unfortunately it will probably take 2-3 weeks for it to recover from this extreme and traumatic event and to start growing normally again, meaning very little real time for it to grow before flowering commences.
Cheers,.......
Organoman.