I agree with the above. Flowering is caused by a chemical build up inside the plant. It takes around 12 hours to get this chemical high enough to trigger flowering. Three days without light would amount to a lot of that chemical building in the cells of the plant. Thus it likely will show some flowering signs. However many people pre flower to sex the plant then return to Veg. So, you should be OK, BUT check for hermis like Washougalwonder said.